Abstract
The Byrsonima genus covers various fruit species known in the Brazilian Amazon as murucizeiro, which is considered as a species with good nutritional quality and features in its composition a variety of volatile compounds. The adaptation of plants to water stress is a complex physiological and biochemical phenomenon. Depending on the intensity and duration of stress, changes ranges from a rapid change in the flow of ions to improve the osmotic pressure, reduction of gas exchange, stabilization of cell structures by osmotic protection to a more drastic change in plant growth pattern. The aim of this work was to study gas exchange and carbon metabolism in young plants of muruci (Byrsonima crassifolia L.) submitted for water suspension. The experimental design was completely randomized with two water conditions: control and drought, with 14 repetitions, totaling 28 experimental units. The parameters analyzed were relative water content, transpiration, stomatal conductance, photosynthetic pigments, concentrations of starch, total soluble carbohydrates and sucrose. The suspension of irrigation for 25 days provided significant differences in all parameters, promoting decreases in the metabolic pathways of plants and reducing the relative water content by 26.92%, transpiration 90%, stomatal conductance 94.79%, photosynthetic pigments (Clrofila (42.1%), Chlorophyll b (50%), Carotenoids (45.1%) and overall (33.3%)) and starch in leaves and roots (73.43 and 63.63%), but increase in the control plants with the total soluble carbohydrates at 63, 87 and 39.5% and sucrose content as 64.73 and 43.99% in the leaves and roots. Therefore, these changes indicated that these plants are susceptible to soils with low water availability. Key words: Carbohydrates, drought, muruci, photosynthetic pigments, transpiration, sucrose.
Highlights
The Byrsonima genus covers various fruit species popularly known in the Brazilian Amazon as murucizeiro and in other regions of Brazil as muricizeiro
The relative water content was significantly affected in murucizeiro plants under water stress during the 25 days of experiment (Figure 1A), with a decrease of 26.92% in this treatment, with a smaller amount of water assimilation when compared with the control plants and the obtained value of 78% in its relative water content
The low water content changed the transpiration rates, given that plants subjected to water stress (Figure 1B) showed a significant reduction of 90% in their values, 0.27 μmol.m-2.s-1 as compared to the control plants which obtained value of 2.83 μmol.m-2.s-1
Summary
The Byrsonima genus covers various fruit species popularly known in the Brazilian Amazon as murucizeiro and in other regions of Brazil as muricizeiro. Is in the Brazilian Amazon, is widespread in tropical America, constituting the most important species, for being the most cultivated and for having the best quality fruits for consumption (Cavalcante, 2010) It has a fleshy fruit, drupoide type, with a round shape or oblong, from ovarian tricarpellate, with each carpel containing an egg. It has a fleshy fruit, drupoide type, with a round shape or oblong, from ovarian tricarpellate, with each carpel containing an egg It is consumed as fresh fruit or used in the preparation of soft drink, ice cream, sweet paste, jam, liqueur and even in savory dishes such as meat stuffing or soups (Carvalho and Nascimento, 2013). The murucizeiro propagation unit is pyrene (core), which contains one to three seeds located in the walls of isolated locules endocarp (Carvalho and Nascimento, 2008)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
