Growth Of Young Plants Research Articles

Effect of high static electric field on germination and early stage of growth of Avena sativa and Raphanus sativus

Presented study investigated the impact of a stationary electric field with an average value of 185 kV/m on the germination process and early growth of radish (Raphanus sativus – a eudicot plant) and oat (Avena sativa – a monocot plant). Electric field stimulation may prove to be one method to sustainably increase crop efficiency. The research is aimed to increase knowledge of the effect of a static electric field on the plant growth process, because understanding of the topic is still limited. The plants were grown on a viscose substrate in a dark room without any light. Studies have shown that the electric field can affect the germination and growth process depending on the plant species. The findings indicate a positive influence of the electric field on radish germination. The presence of the electric field accelerates the germination process and growth of young plants. On the first day of germination (the 3rd day of cultivation), about 3.2 times as many plants germinated in the samples exposed to a stationary electric field compared to the control samples. On the last day of the experiment (the 8th day of cultivation), the tallest plants in the samples subjected to the electric field were 8 % higher, compared to the tallest plants in the control samples. On the other hand, the results demonstrate a negative impact of the electric field on oat seed germination. The presence of an electric field delays the germination process and reduces the number of germinated seeds. On the last day of the experiment (the 11th day of cultivation), about 1.25 times fewer oat plants germinated in the samples exposed to a stationary electric field compared to the control samples. The tallest plants in the samples subjected to the electric field were 1.1 times smaller than the tallest plants in the control samples.

Impact of ZnO nanopriming on physiological and biochemical traits of wheat (Triticum aestivum L.) seedling

To ascertain the ideal dosage of ZnO NPs (Zinc Oxide Nanoparticles), we conducted an investigation on the priming effects of varying concentrations of ZnO NPs on germination and physio-biochemical parameters of wheat. In this study, ZnO NPs were synthesized and characterized for their physico-chemical properties followed by confirmation of the formation of ZnO NPs. Throughout this study, wheat seeds were subjected to ZnO NPs at various concentrations of 5, 50, 100, 250, and 500 ppm for a period of 4 h via continuous aeration. The primed seeds were sowed in plastic bags, allowed to grow for 21 days, following which comprehensive evaluations of physio-biochemical attributes were conducted. At 250 ppm, an impressive 100% of seeds successfully germinated compared to the control group. The examined physiological factors such as shoot length, root length, and fresh as well as dry weights of leaf and root tissues all exhibited notable increases with the ascending concentrations of ZnO NP up to 250 ppm. However, beyond this threshold, at 500 ppm, these parameters experienced a decline. Inductively coupled plasma atomic absorption spectrophotometer (ICP-AAS) measurements validated the progressive increase in Zinc content in the nanoprimed seedlings, further affirming the dose-dependent trend. Zinc oxide nanoparticles notably improved key biochemical features, including elevated levels of total chlorophyll, malondialdehyde (MDA), total protein, and the accumulation of osmolytes such as proline and glycine-betaine. Additionally, the presence of ZnO NPs led to increased activity of antioxidant enzymes like superoxide dismutase (SOD) and catalase in a dose-dependent mananer. Collectively, the amassed data underscores the efficacy of the 250 ppm ZnO NPs treatment, which emerged as superior in comparison to both the control group and other administered treatments. These findings underscore the potential of ZnO NPs at a concentration of 250 ppm as a valuable seed nanopriming agent, effectively enhanced germination and robust early-stage growth in young plants.

Effect of application of urban sewage sludge as organic amendment on germination and growth of Retama monospermain Oran region of Algeria

Appropriate disposal of huge amount of sewage sludge generated in urban areas pose a serious threat to the environment. The urban wastewater treatment sludge has the potential as mineral organic amendment strategy in th fight against wind erosion through planting of Retama monosperma in Algeria. In the present study, the sewage sludge was sampled at the Bousfer –Oran wastewater treatment plant, and amended with different cultivation substrates. Further, its influence on the growth of young R. monosperma, plants, with an aim to replant them at sandy littoral deposits. The preliminary results of our work showed that the replanting of young Retamaplants in the substrate formed by a mixture of mud and limestone showed improved growth compared to the fourteen other substrates tested, from the point of view of structure, texture and fertilizing abilities.The sample of a mixture of clay and mud had a compact structure for the seeds to germinate. However, the growth of young plants transplanted into the latter was found to be improved giving an acceptable result considering the contributions of this organic amendment.

Interactions between root hairs and the soil microbial community affect the growth of maize seedlings.

Root hairs are considered important for rhizosphere formation, which affects root system functioning. Through interactions with soil microorganisms mediated by root exudation, root hairs may affect the phenotypes and growth of young plants. We tested this hypothesis by integrating results from two experiments: (1) a factorial greenhouse seedling experiment with Zea mays B73-wt and its root-hairless mutant, B73-rth3, grown in live and autoclaved soil, quantifying 15 phenotypic traits, seven growth rates, and soil microbiomes and (2) a semi-hydroponic system quantifying root exudation of maize genotypes. Possibly as compensation for lacking root hairs, B73-rth3 seedlings allocated more biomass to roots and grew slower than B73-wt seedlings in live soil, whereas B73-wt seedlings grew slowest in autoclaved soil, suggesting root hairs can be costly and their benefits were realized with more complete soil microbial assemblages. There were substantial differences in root exudation between genotypes and in rhizosphere versus non-rhizosphere microbiomes. The microbial taxa enriched in the presence of root hairs generally enhanced growth compared to taxa enriched in their absence. Our findings suggest the root hairs' adaptive valueextends to plant-microbe interactions mediated byroot exudates, affecting plant phenotypes, and ultimately, growth.

Screening of Amaranth (Amaranthus cruentus L.) Mutant Lines for Salinity Tolerance

Aims: The present study was carried out to access the salt tolerance level of nine amaranth (Amaranthus cruentus) mutant lines selected from Benin cultivar ‘Locale’ at young plants stage in comparison with the cultivar ‘Locale’ used as control.
 Study Design: The experiment was laid out as a Completely Randomized Design with three replications.
 Place and Duration of Study: The experiment was carried out in a screening house at University of Abomey-Calavi, City of Abomey-Calavi, Republic of Benin from May to June, 2020.
 Methodology: Three-weeks old plants of the nine stable mutant lines and the control cultivar ‘Locale’ were planted in pots containing a mixture of potting soil and sand. NaCl concentrations: 0; 100; 150 and 200 mM were given by irrigation once in two days Plant growth parameters were evaluated after two weeks.
 Results: Salt effect caused a reduction of young plant growth whatever the growth parameter considered with a significant disparity (p=.001) among the genotypes. Growth of the control cultivar, lines 1, 11 and 15 was most affected under salt stress whereas that of lines 18; 23 and 16 was least affected. A significant difference (p=.01 or p=.001) was observed among the salt tolerance index of genotypes. The highest salt tolerance index was observed in the line 23 followed by lines 18 and 2; and the lowest in line 15 followed by line 17, line 10 and the control cultivar.
 Conclusion: Some variability was observed among lines for their salt resistance. Lines 23, 18 followed by line 2 appeared as the most salt resistant types whereas line 15, followed by lines 17, 10 and the control cultivar were the most salt sensitive. Thus, lines 23, 18 and 2 are promising for salt affected areas. Further studies are necessary to determine the physiological and biochemical mechanisms involved in the lines’ salt resistance.

Silicon reduces zinc absorption and triggers oxidative tolerance processes without impacting growth in young plants of hemp (Cannabis sativa L.).

Hemp (Cannabis sativa L.) is a promising crop for non-food agricultural production on soils contaminated by moderate doses of heavy metals, while silicon, as a beneficial element, is frequently reported to improve stressed plant behavior. Using a hydroponic system, plants of Cannabis sativa (cv. Santhica 27) were exposed for 1week to 100µM Zn in the presence or absence of 2mM Si. Zinc accumulated in all plant organs but was mainly sequestered in the roots. Additional Si reduced Zn absorption but had no impact on Zn translocation. Zn accumulation had a slight negative impact on leaf number, stem length, and chlorophyll content, and additional Si did not mitigate these symptoms. Exogenous Si reduced the Zn-induced membrane lipid peroxidation (assessed by malondialdehyde quantification) and increased the total antioxidant activities estimated by the FRAP index. In the absence of Si, leaf phytochelatin and total glutathione were the highest in Zn-treated plants and Si significantly decreased their concentrations.

Potassium deficiency reduces sugar yield in sugar beet through decreased growth of young plants

AbstractBackgroundOptimum potassium (K) nutrition is essential for high sugar yield and quality of beet crops.AimsWe quantified the effect of potassium deficiency on sugar beet dry matter and sugar yield formation during the growing season.MethodsSugar beets were grown on low, medium, and high soil K concentrations in a long‐term K fertilizer field experiment on a silt loam alluvial soil. Plants were harvested at four time points during the growing season, including the final harvest. At each harvest, the dry matter yield and K concentration of leaves and beets (when applicable) were recorded, allowing us to study their growth rates in different growth phases. At the final harvest, sugar concentration and internal beet quality were measured.ResultsLow soil K concentrations resulted in an approximately 10% lower sugar yield compared to high soil K supply. Interestingly, retarded growth of low K plants already occurred during the germination phase and in the first weeks thereafter, whereas later on, growth rates were similar. Higher soil K levels led to an increased K uptake rate and thus a higher final total K uptake. High K plants showed rapid youth growth and reached their maximum growth rates earlier than plants grown under low K conditions. The initial differentiation between the low and high K treatments persisted because the plants subsequently grew at similar growth rates at both low and high soil K supplies.ConclusionThe early growth reduction in the low K treatment was probably caused by the low amount of K stored in sugar beet seeds in combination with low K availability in the soil. It is concluded that under overall low soil K conditions, adequate amounts of K fertilizer should be applied to meet the demand of sugar beet seedlings for maximum growth and final sugar yield. Banded K fertilizer application next to the plant rows is supposed to be efficient for this purpose.

PERBANDINGAN KERAGAAN TANAMAN KELAPA SAWIT (Elaeis guineensis Jacq.) PADA SISTEM PEREMAJAAN KONVENSIONAL DAN UNDERPLANTING

Rejuvenation is the replacement of new unproductive plant with new plants that are more productive and profitable. In the cultivation of oil palm there are several alternative models of rejuvenation that can be applied including conventional rejuvenation, underplanting rejuvenation and conventional rejuvenation with intercropping. This research was conducted in the Rambutan PTP. Nusantara III (Company). The time of the study was carried out in February to July 2019. This research was conducted using descriptive analysis method, namely by collecting primary data and secondary data. Primary data, each data for conventional rejuvenation and underplanting model that is. Morfological observation (midrib) and secondary data. Each data for conventional rejuvenation and underplanting model viz, insert (2017, 2018, 2019) and interest and Fruit Calculation Data. The results showed that conventional rejuvenation techniques at the time before planting carried out include several stages including the felling of old plants and tillage until the area was ready for replanting so as to reduce the level of pest infestation and provide ideal soil for plant growth in the field. Mean wile for underplanting planting system places the insertion height ths hetat occurs in underplanting planting system which replace the disruption of young plant growth after the undisciplined implementation of underplanting technique. Poisoning of old plants is late and results in late mutation from TBM to TM ieless interest and fruit in the underplanting technique.

The giant willow aphid (Tuberolachnus salignus) and its effects on the survival and growth of willows

AbstractThe giant willow aphid (Tuberolachnus salignus) is an invasive pest that can attain large populations on willows (Salix spp.). This has the potential to have a negative impact on the extensive use of willows for soil conservation, and as a source of pollen and nectar for honey bees in New Zealand. A willow nursery field trial was established to evaluate the aphid populations, and the survival and growth of young plants of several willow species and hybrids, during two growing seasons from planting. The willow species and hybrids varied widely in their susceptibility to the aphid, with large aphid populations and plant mortality in the most susceptible willows, and reductions in plant growth in all but aphid‐resistant willows. The effects on the plants were not seen in the first season, but occurred during the second season. The aphid can be expected to have some negative impacts in New Zealand, with reductions in growth of some willows commonly used for soil conservation, and for pollen and nectar for honey bees.

Silicon reduces cadmium absorption and increases root-to-shoot translocation without impacting growth in young plants of hemp (Cannabis sativa L.) on a short-term basis.

Textile hemp (Cannabis sativa L.) is a non-edible multipurpose crop suitable for fiber production and/or phytoremediation on moderately heavy metal-contaminated soils. Experiments were conducted in nutrient solution to assess the short-term impact of silicon (Si), a well-known beneficial element, on plants exposed to 20 μM cadmium (Cd) in nutrient solution. Cd decreased plant growth and affected photosynthesis through non-stomatal effects. Cd translocation factor was higher than 1, confirming the interest of hemp for phytoextraction purposes. Additional Si did not improve plant growth after 1 week of treatment but decreased Cd accumulation in all organs and improved water use efficiency through a decrease in transpiration rate. Si had only marginal impact on Cd distribution among organs. It increased glutathione and phytochelatin synthesis allowing the plants to efficiently cope with oxidative stress through the improvement of Cd sequestration on thiol groups in the roots. Si may thus have a fast impact on the plant behavior before the occurrence of plant growth stimulation.

English

Salt stress is one of the abiotic factors that cause a depressive effect on plants. This work aims to evaluate the effect of salt stress on growth of young plants of 7 cultivars (Adja-ouere, Côte d’Ivoire, Dangbo, Kpinman, Kombara F1, Lanman and Togan) of African eggplant (Solanum macrocarpon) produced in Benin, locally called Gboma, in order to determine their relative salt-resistance levels. Five NaCl concentrations (0; 30; 60; 90 and 120 mM) were applied to 4-weeks old plants for 2 weeks in a completely randomized design with 3 replicates. Results revealed that the 3 root growth parameters evaluated were only significantly affected for one of the 7 cultivars while for the growth parameters of the aerial part, at least 4 cultivars were significantly affected except for leaf number. Thus, growth of aerial part was more sensitive to salt stress than that of root part. Cultivar Dangbo, which did not undergo significant reduction in growth for none of the 9 parameters evaluated, was the most salt resistant. It was followed by Togan which underwent significant growth reduction for only 3 growth parameters and only at the highest NaCl concentrations used. On the other hand, cultivar Kombara F1 which underwent a significant growth reduction from the lowest NaCl concentrations used for 4 of the nine parameters evaluated was the most salt sensitive. It was followed by Lanman, Kpinman and Adja-ouere with respectively 3, 2 and 2 growth parameters significantly reduced at the lowest NaCl concentrations used. Cultivar Côte d’Ivoire showed intermediate behavior. Key words: Plant growth, NaCl, salt resistance, cultivars’ discrimination, Gboma.&nbsp

Response of three tossa jute (Corchorus olitorius L.) cultivars produced in Benin to salinity stress at germination and young plant stages

The response of three tossa jute cultivars Ordinaire, 5-Doigts and Acc : Sud 2 to salt stress was evaluated at germination and young plant stages. Five NaCl concentrations: 0; 30; 60; 90 and 120 mM NaCl were used. Seeds were submitted to NaCl in petri dishes and germination was checked every day during thirty days in a completely randomized design with four replicates. Four-week old plants were submitted in pots to the same five NaCl concentrations by irrigation every two days for two weeks in screen house. NaCl reduced seed germination rate in all cultivars from day 2 to day 30 and the germination index. At the end of the 30 days, salt stress reduced the final germination percentages with a significant difference among cultivars: cultivar 5-doigts was the least affected than the two other cultivars. Salt effect caused a reduction of young plant growth whatever the growth parameter considered with a significant difference among cultivars. The growth of cultivar Acc:Sud 2 was more affected by salt stress with the lowest salt tolerance index whereas that of cultivar Ordinaire was the least affected with the highest salt tolerance index. Thus, cultivar 5-Doigts appeared as the most resistant to salt stress at germination stage among the three cultivars; whereas cultivar Ordinaire followed by 5-Doigts was the most salt resistant at young plant stage.

Response of seven tomato (Lycopersicon esculentum Mill.) cultivars produced in Benin to salinity stress at young plant stage

In this study, we evaluated the salt resistance level of seven tomato cultivars Akikon, Tounvi, Thorgal, F1 Mongal, Padma, Petomech and TLCV15 at young plant stage. The experiment was laid out as a Randomized Complete Design (RCD) with four replications in a greenhouse. Three-week old plants from the seven cultivars were submitted in pots containing a mixture of potting soil and sand to five NaCl concentrations: 0; 30; 60; 90 and 120 mM NaCl corresponding respectively to an electric conductivity of 0.221; 3.827; 6.47; 10.56 and 14.02 dS.m-1 by irrigation every two days. Plant growth parameters were evaluated after two weeks. Salt effect caused a reduction of young plant growth whatever the growth parameter considered with a significant difference among cultivars. Growth of cultivars Padma, Akikon and Petomech was more affected by salt stress with two or three growth parameters significantly reduced at 30 mM NaCl whereas no growth parameter was significantly affected at less than 60 mM NaCl for cultivars Thorgal and Tounvi. Thus, cultivars Akikon, Petomech and Padma appeared as the most sensitive to salt stress. In contrast, cultivars Tounvi and Thorgal appeared as the most salt-resistant. Cultivars F1 Mongal and TLCV15 had intermediary behavior.

Leaves contents of nutrients in Cryptostegia madagascariensis in different salinized soils

The species C. madagascariensis occurs in humid and arid areas, thus, the species has been standing out as an invasive plant. An experiment was developed in greenhouse with the objective of evaluating the leaf contents (nutritional status) of plants of these invasive plants subjected to different levels of salinity and humidity. The treatments were arranged in randomized blocks, with four repetitions, following the factorial arrangement of 4x4x2, corresponding to the five levels of salinity or incubations (0.3; 1.0; 2.0 and 4.0 dS m-1), four moisture contents (20% of CC; 40% of CC; 70% of CC and 110% of CC) maintained until the end of the test and with two types of soils (Floss Neossol and Vertisolo). Initially, two soils were used, a Floss Neossol and a Vertisol. Leaf samples were analyzed to determine the levels of N, P, K and Na. The soils were placed in pots with a capacity of 21 liters, where each pot contained 19 kg of soil and 4 plants per plot in randomized blocks with 4 repetitions. After elapsed 152 days after sowing, samples of plant tissue (leaves) were taken for chemical analysis. At the end of the experiment, the following leaf variables were carefully evaluated: Nitrogen (N); Phosphorus (P), Potassium (K+) and Sodium (Na+). The increase in humidity in both soils under growth of young plants increased sodium levels and reduced potassium levels in plant tissue resulting from excess sodium in the two soils as a function of salinity and humidity.

Effectiveness of plant growth-promoting Rhizobacteria (PGPR) to control gall rust of Falcataria moluccana under field conditions

Gall rust caused by Uromycladium spp. is a most devastating disease of Falcataria moluccana plantations in Indonesia since a decade. There is no effective control measures to suppress rust gall disease. The objectives of the research was to investigate the effectiveness of PGPR on seedlings growth, gall rust severity and growth of young Falcataria moluccana trees. Talc-based powder formulation of PGPR mixtures of Pseudomonas fluorescens, Bacillus polymixa and Rhizobium spp. was used. First experiment consisted of testing as a seed treatment by PGPR using four concentrations of PGPR i.e. 0 (untreated), 2.5 g/L, 5 g/Land 10 g/L equal to 1.25 x 106 cfu/L, 2.5 106 cfu/L and 5 x 106 cfu/L. Emergence rate and seedlings growth were evaluated. Second experiment was a field trial using young three months age-seedlings trees under pathogen natural infestation, designed as a complete randomized block design with six replications. Treatments were PGPR 2.5 106 cfu/kg and 5 x 106 cfu/kg, untreated and mancozeb fungicide. Powder formulation of PGPR was mixed with granule NPK fertilizer and applied as soil incorporation at planting date and 42 days after transplanting. Disease severity, plant height and stem diameter were observed weekly at 1 to 11 week after transplanting. Seed treatment with all concentration of PGPR did not affect germination rate, but increased seedlings growth. Moreover, field application of PGPR at the rate of 5 x 106 cfu/kg in PGPR-NPK fertilizer mixture was the best treatment to control galll rust of young plants under field conditions with an effectiveness rate of 42.28%, compared to fungicide treatments which has effectivenes rate of 34.39%. The treatments also enhanced the growth of young plants.

Elevated atmospheric CO2 concentration improves water use efficiency and growth of a widespread Cerrado tree species even under soil water deficit

Changes in atmospheric CO2 levels are accompanied by ecological interactions involving other environmental factors, such as drought, which can severely alter the water balance of plants, thereby influencing sap flow, gas exchange, and plant growth. The objective of this study was to evaluate the water use economy, leaf gas exchange, and growth of young plants of the species Lafoensia pacari subjected to high concentrations of atmospheric CO2 ([CO2]) and soil water deficit. Increased vapor pressure deficit was observed from 1200 to 1800 hours. Plants under elevated [CO2] exhibited increased leaf photosynthesis, resulting in improved growth. Specific leaf area was lower in plants under high [CO2], mainly after soil water deficit treatment. Daily irrigated plants growing under ambient [CO2] had higher stem sap flow velocity (cm h-1) and hourly sap flow (kg h-1), mainly during the hottest hours of the day, than plants under high [CO2]. Improved water use by plants growing under high [CO2] may result in increased availability of water in the soil, partially offsetting future drought events and extending the growth period.

Tolerance of Eugenia dysenterica to Aluminum: Germination and Plant Growth.

Native Cerrado plants are exposed to soils with low pH and high availability of Al. In this study, we measured the Al content in adult plants, and investigated the effects of various Al doses on germination and early development of Eugenia dysenterica plants. For germination tests, the seeds were soaked in Al solution and evaluated for twenty days in growth chambers. In a second experiment, young plants were cultivated in hydroponic systems with various Al concentrations to evaluate the morphological, anatomical and physiological characteristics of E. dysenterica. Anatomical changes and low germinative vigor were observed in seeds germinated in 600 and 800 μmol Al3+ L−1. In the hydroponic system, 200 μmol Al3+ L−1 stimulated root growth in young plants. The activity of antioxidant enzymes and the accumulation of phenolic compounds were greatest at the highest Al doses, preventing changes in gas exchange and chlorophyll a fluorescence. Starch grain accumulation was noted in plant cells exposed to 200 and 400 μmol Al3+ L−1. Adult E. dysenterica trees also accumulated Al in leaves, bark and seeds. These data suggest that E. dysenterica is tolerant to Al.

Bioclimatic assessments for tea cultivation in Western Nghe An

Bioclimatic assessments for tea cultivation in Western Nghe An

Germination of Seeds and Growth of Young Cropson the Mine Dump Soil of Kišnica and Its Surrounding Area

The percentage of seed germination and growth of young plants of wheat crops (Triticum vulgare L.), barley (Hordeum vulgare L.) and maize (Zea mays L.) on the substrate of the mine dump of Kisnica mine and its surrounding area was studied. The growth of young plants was monitored for 25 days from sowing. The results obtained during the study showed that the percentage of seed germination and the growth of the studied plants varied depending on both the plant species and on the concentration of the pollutants in the used soil from different sites, as well as the distance of the sites from the pollutant emitters. The highest percentage of germination was observed in wheat seeds from the site Gracanica (3 km away from the emitter) and the smallest percentage of germination was found in barley seeds from the site Kisnica mine. The fastest growth was recorded in the wheat from the site Gracanica, and the greatest inhibition during plant growth was recorded in the corn from the site Kisnica mine pit where the height of stem was only 2.45% compared to the control. Toxic substances (heavy metals from the mine dump of Kisnica mine) had the inhibitory effect on the seed germination. Low concentrations of heavy metals in the soil from Gracanica stimulated the growth of plants that, after 25 days of growth, was stopped in all the plants growing on that soil. However, high concentrations of heavy metals inhibited seed germination and the growth of young plants on the substrate from Kisnica mine. The inhibition or stimulation of seed germination and the growth of young plants in the presence of heavy metals in the soil was caused by the inhibition or activation of the enzymatic system responsible for the metabolic processes during morphogenesis.

Мониторингфауны мангровых посадок залива Дам Бай (О. Че, залив Ня-Чанг)

Monitoring of fauna in mangrove plantations is extremely important for understanding developmental patterns of mangrove ecosystems, which contributes to conservation, rehabilitation and sustinable management issues of this economically and ecologically valuable system. In Dam Bay on a mud flat fringed by narrow belt of Rhizophora apiculata, seedlings of the same species were planted in 2005 and 2009. Dynamics of species richness, species composition and density of macro invertebrate fauna were recorded in newly planted mangrove association during ten years. Comparison between the fauna of mangrove plantings at Dam Bay and natural association in Nha Phu Bay was conducted. For those purposes quantitative and qualitative samples were collected from year 2005 to 2015 for Dam Bay, and years 2012 and 2014 for Nha Phu. The most diverse groups of invertebrates were gastropods, bivalves and crabs in both natural and planted mangroves. Faunal richness and quantitative characteristics altered significantly during monitoring period in newly planted mangrove association. We recorded the growth of species richness and density of eurybiotic and opportunistic species, due to the enrichment of the sediments by organic matter and appearance of new hard substrata. At the beginning of 2008, we observed progressive colonization of the plantation by specialized mangrove species, the main reasons were the growth of young plants and as a result gradual complication of vegetation structure. Nevertheless even after 10 years the plantation has lower species richness of specialized fauna than the natural association in Nha Phu. The structure of fauna i.e. proportion of specialized versus eurybiotic species and their abundance may be used as indicators of condition of mangrove associations.