Percentage Of Dead Seeds Research Articles

Kvalitet semena lucerke iz različitih regiona Srbije u periodu čuvanja do 42 meseca

This study presents the findings from assessing the quality of alfalfa seeds collected from three Serbian regions: in each region, batches of seeds from six places were analyzed. The following criteria were investigated: the proportion of dormant seeds, the germinated seed content, the proportion of dead seeds, and the percentage of aberrant seedlings. Seed quality was assessed after six, eighteen, thirty, and forty-two months of storage. The highest seed quality was obtained after thirty and eighteen months of seed storage (91% and 89% of germination, respectively). During the 42-month storage period, the percentage of dead seeds (8%) and abnormal seedlings (7%) increased, while germination declined to 84%. In a storage period of six months, the participation of dormant seeds of 21% affected the germination rate, which was 77%, regardless of the low proportion of dead seeds (1%) and abnormal seedlings (2%).

Respon Viabilitas dan Pertumbuhan 4 Genotipe Sorgum (Sorghum bicolor [L.] Moench) Pasca Simpan 14 Tahun pada Suhu 50C

The research aimed to obtained the viability response of sorghum seeds and their growth after being stored for 14 years at 50C. This study was designed using a randomized block design with 1 factor (genotype). The treatment consisted of 4 genotypes, namely Kawali variety, Numbu variety, S1 line and S4 line. Each treatment was repeated 9 times so that there were 36 experimental units. Each experimental unit consisted of 1 plant. The results of the analysis of variance showed that the percentage of normal germination, the percentage of dead seeds, growth speed, plant height and number of leaves were not affected by genotype. The average percentage of normal germination was 41.71%, the percentage of dead seeds was 58.29%, the growth rate was 12.12%. The average plant height at 5 weeks after planting was 117.55 cm with an average number of leaves was 8.5.

Gibberellic Acid Concentrations and Storage of Caryocar brasiliense (Caryocaraceae) Seeds Propagated in Tubes

The immersion of seeds in gibberellic acid solutions can promote dormancy breaking. Storage can be dynamic in seed longevity. The objective of this work was to evaluate different concentrations of gibberellic acid applied to seeds isolated from two storage times on the emergence of C. brasiliense tree seedlings grown in tubes. There were two experiments with different planting and storage times. The seeds were extracted from the endocarp. In both, a randomized block design was used with the following seven treatments: 0, 50, 100, 500, 1000 and 2000 mg L−1 of GA3 and dry seeds without pre-soaking, with five replications of 20 seeds. The seeds were treated with fungicide and sown in tubes containing substrate. After 60 days, evaluations and transplantation were carried out. In the experiment with older pyrenes (seeds stored for seven months), there was high seed mortality (96.54%) and a small emergence rate (3.45%). On the other hand, when new pyrenes were used, the percentage of dead seeds was 32.71% and emergence was 62.28%. GA3 did not stimulate germination or the diameter of C. brasiliense tree seedlings, except for stem length. The 2000 concentration provided a greater stem length and greater leaf area compared to dry seeds.

Soybean sowing under low water availability conditions: impacts of seed treatment and soil management

Abstract: The aim of this work was to evaluate the impact of soybean sowing in soil with low water availability, under two management systems, using seeds with and without chemical treatment, on the physiological quality of seeds and seedling emergence. For this, two experiments were set up, one under no-tillage system (NTS) and the other under conventional tillage system (CTS), in a randomized block design, both in a 2x6 factorial scheme, with two seed treatment conditions (with and without) and six periods of seed permanence in the soil (0, 24, 48, 72, 96 and 120 h), with four replications. Germination, vigor, percentage of abnormal seedlings and percentage of dead seeds were evaluated. Seed treatment made it possible to maintain germination at acceptable levels for up to five days of permanence of the seeds in the soil, even in CTS. Sowing in soils with low water availability can lead to reductions of 0.2 and 0.5 percentage points per hour of exposure to dry soil in germination and vigor of soybean seeds, respectively.

PENGARUH LAMA PENYIMPANAN TERHADAP VIABILITAS BENIH KEDELAI (Glycine max (L) Merrill) VARIETAS ANJASMORO

The purpose of this study was to determine the effect of storage time and best storage time on the viability of Anjasmoro soybean seeds. This research was conducted in Benteng Village, Sungai Manau District, Merangin Regency with an altitude of ± 204 m asl and a temperature ranging from + 25-31oC. This research was conducted on 17 October 2019 to 17 February 2020. This study used a completely randomized design (CRD) with 5 treatments, namely: P0 (without storage), P1 (1 month of storage), P2 (2 months of storage), P3 (3 months of storage) and P4 (4 months of storage). The parameters observed were the percentage of normal sprouts (%), percentage of dead seeds (%), percentage of damaged germination (%), germination rate (days), hypocotyl length (cm) and root length (cm). To see the effect of treatment on the observed variables, the data obtained were analyzed statistically using variance fingerprints and if the results of the analysis had a significant effect, then proceed with the Duncan New Multiple Range Test (DNMRT) at the 5% real level The results showed that storage time affected the percentage of normal sprouts (%), percentage of dead seeds (%), percentage of damaged germination (%), germination rate (days), hypocotyl length (cm) and root length (cm) of Anjasmoro soybean seeds. . Storage time of 1 month (P1) is the best treatment for the viability of Anjasmoro soybean seeds

PENGARUH LAMA SIMPAN PADA VIGOR BENIH DAN KECAMBAH SORGUM (Sorghum bicolor [L.] Moench) GENOTIPE KAWALI DAN P/F-10-90A

Sorghum is a type of carbohydrate-producing serelia plant. Sorghum has a great potential to be developed in Indonesia. Seed storing time is the time period of the seed storage before the seed is planted again, while the storage of the seed is carried out with the aim of maintaining seed viability in the save period for as long as possible and can be used for the next planting period. The purpose of this study was to determine the effect of storage time on seed vigor and sprouts of Kawali and P/F-10-90A genotypes. This research was conducted at the Laboratory of Seed and Plant Breeding, Faculty of Agriculture, University of Lampung, Bandar Lampung which runs from February 2017 until February 2018. This study uses split plot design with 3 group replications. The main plot is the storage time (LS) that was consisted of 0, 4, 8 and 12 months storage time period. Subplot is genotype (G), which consists of Kawali (G1 ) and P / F-10-90A (G2). The results showed that seed vigor and sprouts decreased significantly at 4 and 8 months storage time with the percentage of dead seeds 16.7% and 40.7%, while the percentage of normal strong sprouts at 4 months amounted to 74% for genotype P/ F-10-90A and 8 months 54% for genotype Kawali. P/F-10 -90A genotypes have higher seed vigor and sprouts vigor compared to Kawali genotypes as indicated by dead seed variables, strong normal sprouts, normal sprout length canopy, long root primary roots, normal sprouts, dry weight normal sprouts, and normally strong sprouts. The effect of interaction between storage time and genotype was shown by seed vigor of genotype P/F-10-90-A seedlings which were proven to be superior for 4, 8 and 12-month storage time period. Excellence of genotype P/F-10-90-A make it can be stored and was allowed to be used as good seed on next season farming.

Relações entre as variáveis das análises de sementes de espécies agrícolas

The aim of this study was to evaluate the direct and indirect relationships between normal seedling germination and other crop seed analysis variables, to identify the relative contributions of seed variables and combine analyses for each crop species. The study was based on the results of 1.332 seed analyses carried out between 2007 and 2014 obtained from the seed laboratory archives of the Universidade Federal de Santa Maria. Path analysis confirmed the true association and influence of dead seeds on the reduction of the germination of Oryza sativa, Avena strigosa, Lolium multiflorum e Triticum aestivum. There was no casual relationship and direct effects of percentage of inert material, other seeds and dormant seed on germination. Germination is more representative in explaining the variability in Lolium multiflorum and Triticum aestivum. The cluster analysis of seed analysis discriminated against regarding your quality of seed lots. The groups differed significantly by germination, percentage of dead seeds and other seeds in Oryza sativa, Glycine max and Lolium multiflorum, respectively.

Harvest Date Influence on Seed Germination of Some Nerica Rainfed Rice Varieties

The present study aims to determine the effect of harvest date on the germination of rice seeds. The experiment was carried out at Nkol bisson, a locality within the forest agro-ecological zone characterized by a bimodal rainfall pattern. Four varieties of NERICA: NERICA 3, NERICA 8, NERICA 9 and 13 NERICA widely grown in Cameroon were used and planted in a completely randomized block design. Rice seed was produced according to the standards of its production and were harvested at six different dates: 20, 25, 30, 35, 40 and 45 days after heading. The harvested seeds were dried at 13% moisture content. The results showed that the harvest dates have a significant effect on the latency, the time corresponding to 50% sprouted grains (T50), the number of sprouted grains, number of dead seed and the number of non-sprouted grains. There was significant difference between rice varieties evaluated and the different harvesting date. The germination rates 98.88%, 99.44%, 99.75% and 97.00% were obtained respectively for the harvest dates of 30, 35, 40 and 45 days after 50% heading. The harvest dates 20 and 25 days after 50% heading presented low germination rates. With these early harvesting dates, the mean percentages of dead seeds ranged between 18.25% and 55.25%. Too early harvest had a negative impact on rice seeds germination. To obtain good germination rate, it is recommend harvesting rice between the ranges of 30 to 40 days after 50% of heading.

Tratamentos pré-germinativos para sementes de Hymenaea stigonocarpa Mart. ex Hayne

http://dx.doi.org/10.5007/2175-7925.2016v29n4p1Hymenaea stigonocarpa, conhecida como jatobá-do-cerrado, pertence à família Fabaceae (Leguminosae) e está incluída na categoria de espécie “quase ameaçada de extinção”. Seus indivíduos ocorrem em áreas de cerrado e cerradão e suas sementes apresentam dormência física. Em razão dessa característica, este estudo teve por objetivo avaliar diferentes tratamentos pré-germinativos em sementes de H. stigonocarpa, sendo eles: imersão em fogo, ácido sulfúrico, ácido clorídrico, acetona, éter e água quente (100°C), além de escarificação mecânica com lixa e corte do tegumento com alicate de unha, lavagem em água corrente por 2 h. Os resultados obtidos pelos tratamentos foram comparados aos da testemunha, que não foi submetida a nenhum deles. Os parâmetros analisados foram: a porcentagem de germinação, o Índice de Velocidade de Germinação (IVG) e os percentuais de sementes duras e firmes e de sementes mortas. Os resultados obtidos foram: a) germinação: a água fervente e o ácido sulfúrico foram superiores aos da testemunha; b) IVG: a água fervente, o ácido sulfúrico, o fogo e a lixa foram superiores aos da testemunha; e c) não foram observadas diferenças estatísticas entre a testemunha e os demais tratamentos para o percentual de sementes mortas. Em vista disso, os tratamentos com a água fervente e o ácido sulfúrico se mostraram os melhores, considerando-se os parâmetros analisados.

Desempenho de sementes nuas e revestidas de azevém-anual em condições de estresse salino

Com o objetivo de avaliar o efeito do revestimento de sementes decorrente do aumento da concentração salina, sementes de azevém (Lolium multiflorum Lam.), cultivar "comum", nuas e revestidas, foram expostas a seis concentrações de cloreto de sódio (NaCl): 48, 66, 97, 129 e 145 mM. O material-base empregado no revestimento foi farelo de madeira. Avaliaram-se a emergência de plântulas normais, anormais, sementes dormentes e mortas, o índice de velocidade de emergência, o comprimento da parte aérea e da raiz e o peso fresco da parte aérea das plântulas. A análise dos resultados permitiu concluir que a emergência de sementes nuas e revestidas de azevém-anual decresce com o aumento da salinidade do meio, afetando negativamente o desenvolvimento de plântulas normais. O aumento dos níveis de NaCl faz as sementes entrar em dormência. O revestimento usado nas sementes não é capaz de protegê-las da ação prejudicial da salinidade a partir da concentração de 64 mM de NaCl.

Métodos de inoculação de Alternaria alternata e A. dauci em sementes de salsa e sua influência na qualidade fisiológica

O objetivo neste trabalho foi avaliar o efeito da associação de Alternaria alternata e A. dauci na qualidade fisiológica de sementes de salsa inoculadas sob dois métodos, suspensão de conídios e restrição hídrica. Para a inoculação por suspensão, foi preparada uma solução contendo 10(5) conídios de A. alternata, A. dauci e ambas as espécies (A. alternata + A. dauci), na qual as sementes permaneceram por 30 minutos. Para inoculação por restrição hídrica foi preparado meio BDA, acrescido com 33,10 g/L de manitol, no qual cresceram as colônias de A. alternata; A. dauci e A. alternata + A. dauci. As sementes permaneceram nas placas por 48 horas. Após os procedimentos de inoculação, a qualidade fisiológica das sementes foi avaliada por testes realizados em condições controladas de laboratório e em casa de vegetação. As sementes de salsa tiveram a sua qualidade fisiológica prejudicada pela associação com A. alternata e A. dauci em condições de laboratório, especialmente com relação à germinação, primeira contagem de germinação, porcentagem de plântulas anormais, porcentagem de sementes mortas e ao teste de frio.

Relações entre variáveis nas análises de sementes de espécies florestais nativas do Rio Grande do Sul

Este trabalho teve por objetivos identificar as variáveis avaliadas nas análises de sementes que mais influenciaram na qualidade dos lotes armazenados de sementes de espécies florestais nativas do Sul do Brasil e verificar suas relações com a percentagem de germinação de plântulas normais. As informações relacionadas às análises de sementes de oito espécies florestais foram obtidas do banco de dados do laboratório de análise de sementes florestais da Fundação Estadual de Pesquisa Agropecuária do Rio Grande do Sul. Realizou-se a análise de trilha, para verificar a existência da relação entre pureza, peso de mil sementes, umidade, percentagens de germinação de plântulas normais e anormais e percentagens de sementes firmes e mortas, avaliadas nos lotes armazenados no laboratório. A percentagem de germinação de plântulas normais possui maiores relações significativas com as variáveis peso de mil sementes, umidade das sementes e percentagem de sementes mortas.

STUDY FOR THE EVALUATION OF DILL (ANETHUM GRAVEOLENS L.) SEEDS QUALITY

In this experiment two different lots of dill seeds (Anethum graveolens L.): lot A - cv. 'Amat' and lot B - cv. 'Lukullus' were evaluated for their characters in terms of their quality. The seeds of the B lot had a lack of embryos caused by lygus bugs (Lygus ssp.), and as a consequence their germination capacity was lower and the number of seeds qualified in the germination test as healthy ungerminated was larger, in comparison with these seed characters of the A lot. Both lots were heavily colonized by fungi, but the percentage of dead seeds was higher in the B lot than in the A one. The seeds in the B lot were previously injured by lygus bugs.

Biometria de frutos e germinação de sementes de Couratari stellata A. C. Smith (Lecythidaceae)

Estudou-se as características biométricas de frutos e quantificou-se a germinação em Couratari stellata, espécie cuja altura varia de 30 a 40 m e ocorre em solos de terra firme das Guianas até a região central e oeste da Amazônia. Determinou-se o comprimento e o número de sementes por fruto; número de sementes completamente formadas e de sementes vazias; o grau de umidade; a massa de 100 sementes; a percentagem de germinação, de plântulas anormais e de sementes mortas; e o tempo médio de germinação. A semeadura foi realizada em substrato de areia e serragem na proporção de 1:1, em quatro repetições de 50 sementes. Comprimento e número de sementes por fruto variaram de 59,0 a 97,0 mm e de cinco a 26 sementes. As percentagens de sementes completamente formadas e de sementes vazias foram de 93,3% e 6,7%, respectivamente. A massa de 100 sementes foi de 10,7 g com 56,8% de umidade. A germinação foi lenta e desuniforme iniciando-se aos 29 dias após a semeadura, atingindo a germinação de 82,5% aos 65 dias. O tempo médio de germinação foi de 45,5 dias. A percentagem de sementes mortas e de plântulas anormais foi de 17,0% e 0,5%, respectivamente. Não houve relação entre tamanho de frutos e número de sementes por fruto. Observou-se também que sementes de C. stellata apresentam dormência.

Reduction of hardseededness in mungbean by short duration high temperature treatment

Seeds of 2 lines of mungbean (Vigna radiata), soft-seeded cv. Berken and HS23 with 34% hard seeds, were agitated on a hot plate to determine the effects of temperatures up to 200�C on hardseededness, germination and seed variability. The results of this experiment, combined with a pilot trial using a heated rotating cylinder, showed that the temperature of 175�C for 30 s was the optimum treatment to produce seeds suitable for sprouting. This heat treatment reduced hardseededness from 34 to 1%, increased germination from 64 to 96%, and did not increase the percentage of dead seeds.

Capacidade de germinação e quebra de dormência em sementes de cultivares de videira

Com a finalidade de gerar plântulas para o melhoramento genético, investigou-se a germinação de sementes de uva estudando-se a estratificação a frio, a aplicação de giberelina e a interação desses fatores. A conjugação de períodos de estratificação maiores que 13 dias com doses de giberelina (GA3) mostrou-se útil na quebra da dormência e na redução do seu tempo. A dose ideal de GA3 foi encontrada ao redor de 2.000 ppm e o menor período de estratificação, de cerca de 32 dias. Sementes de 61 progenitores potenciais foram germinadas em vasos com terra, mostrando-se a maior parte deles apta a ser usada em programas de melhoramento, com germinação superior a 45%, após os tratamentos indicados.