Cristianne Santana Santos, Célia Gomes de Siqueira, Marcos Vinicius Meiado
{"title":"Desiccation sensitivity of fresh and germinating seeds of Tabebuia aurea: physiological and biochemical implications","authors":"Cristianne Santana Santos, Célia Gomes de Siqueira, Marcos Vinicius Meiado","doi":"10.1007/s11738-024-03676-2","DOIUrl":null,"url":null,"abstract":"<div><p>The mechanisms of tolerance to desiccation are one of the main factors related to the ability to survive the conditions of water deficit imposed by abiotic stress. Understanding the limits of desiccation tolerance in species and environmental factors promotes this capacity, which is of great ecological importance since it can help in the choice of species used for ecological recovery. In this study, we analyze tolerance limits, and physiological and biochemical parameters in desiccation tolerance (DT) of <i>Tabebuia aurea</i> (Silva Manso) Benth. & Hook.f. ex S. Moore (Bignoniaceae) seeds and germinating seeds. First, we analyzed the DT in seeds under different free water contents (0.25, 0.75, 1.5, 2.25, and 3% of free water content) in silica gel at 25 °C and forced air circulation oven at 40 °C. During development, we evaluated the ability of germinating seeds with different root sizes (0 to 2, 2 to 5, and 5 to 10 mm) to tolerate desiccation. We quantified reducing sugars and total proteins in all evaluated treatments. Seeds and seedlings of <i>T. aurea</i> showed large DT to both types of desiccation. The concentration of reducing sugars increased with decreasing seed-free water contents. The germinating seed also contents of reducing sugars reduced. We conclude that the large DT before and after germination of <i>T. aurea</i> with roots of up to 10 mm is related to changes in biochemical mechanisms that are important to maintaining this tolerance.</p></div>","PeriodicalId":6973,"journal":{"name":"Acta Physiologiae Plantarum","volume":"46 5","pages":""},"PeriodicalIF":2.4000,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Physiologiae Plantarum","FirstCategoryId":"99","ListUrlMain":"https://link.springer.com/article/10.1007/s11738-024-03676-2","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
The mechanisms of tolerance to desiccation are one of the main factors related to the ability to survive the conditions of water deficit imposed by abiotic stress. Understanding the limits of desiccation tolerance in species and environmental factors promotes this capacity, which is of great ecological importance since it can help in the choice of species used for ecological recovery. In this study, we analyze tolerance limits, and physiological and biochemical parameters in desiccation tolerance (DT) of Tabebuia aurea (Silva Manso) Benth. & Hook.f. ex S. Moore (Bignoniaceae) seeds and germinating seeds. First, we analyzed the DT in seeds under different free water contents (0.25, 0.75, 1.5, 2.25, and 3% of free water content) in silica gel at 25 °C and forced air circulation oven at 40 °C. During development, we evaluated the ability of germinating seeds with different root sizes (0 to 2, 2 to 5, and 5 to 10 mm) to tolerate desiccation. We quantified reducing sugars and total proteins in all evaluated treatments. Seeds and seedlings of T. aurea showed large DT to both types of desiccation. The concentration of reducing sugars increased with decreasing seed-free water contents. The germinating seed also contents of reducing sugars reduced. We conclude that the large DT before and after germination of T. aurea with roots of up to 10 mm is related to changes in biochemical mechanisms that are important to maintaining this tolerance.
期刊介绍:
Acta Physiologiae Plantarum is an international journal established in 1978 that publishes peer-reviewed articles on all aspects of plant physiology. The coverage ranges across this research field at various levels of biological organization, from relevant aspects in molecular and cell biology to biochemistry.
The coverage is global in scope, offering articles of interest from experts around the world. The range of topics includes measuring effects of environmental pollution on crop species; analysis of genomic organization; effects of drought and climatic conditions on plants; studies of photosynthesis in ornamental plants, and more.