干旱林树种的气候和种子大小:对种子产量、生理品质和对非生物胁迫的耐受性的影响

IF 1.1 4区 农林科学 Q3 AGRONOMY Journal of Seed Science Pub Date : 2023-04-28 DOI:10.1590/2317-1545v45264166
S. E. V. Gomes, Raquel Araujo Gomes, B. F. Dantas
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引用次数: 2

摘要

摘要:预计本世纪末半干旱地区的种子生产、质量和萌发可能受到剧烈气候变化的影响。我们评估了Anadenanthera colubrina var. cebil (Griseb.)。以豆科植物为研究对象,对不同大小、不同种群、不同收获期的豆科植物种子的萌发和对环境胁迫的耐受性进行了研究,旨在预测未来气候的影响。获取种子的萌发温度、盐度和渗透极限和要求。在适宜温度、盐度和水分亏缺条件下,对不同种群收获的大、小种子的萌发进行了评价。一项温室盆栽试验测试了每周的灌溉制度和幼苗的出苗和生长情况。种子萌发最适温度为34.8℃,极限温度为5.6℃和50.9℃。大种子和小种子在发芽方面没有区别,但小种子在压力条件下更有效。幼苗可以在每周少量灌溉的情况下发芽生长,持续四个月。预测的温度升高不会影响种子的萌发,但由于降雨不足,可用于育苗的时间会减少。干旱年份小粒种子产量的增加是应对恶劣环境的一种策略,而不是种子质量的下降。
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Climate and seed size of a dry forest species: influence on seed production, physiological quality, and tolerance to abiotic stresses
Abstract: Seed production, quality and germination are likely to be affected by a drastic climate change in semi-arid areas predicted for the end of the century. We evaluated Anadenanthera colubrina var. cebil (Griseb.) Altschu (Fabaceae) seeds of different sizes, populations and harvest years for germination and tolerance to environmental stresses aiming to predict impacts of future climate. Seeds were accessed for germination temperature, salinity and osmotic limits and requirements. Germination of large and small seeds harvested in different populations was evaluated in optimum and stressful temperature, salinity and water deficit. A glasshouse pot assay tested weekly irrigation regimes and seedlings emergence and growth. Optimal temperature for seeds germination was 34.8 oC and limits were 5.6 oC and 50.9 oC. Large and small-sized seeds do not differ in germination, however small seeds are more efficient in stressful conditions. Seedlings can emerge and grow under small weekly irrigation for four months. The predicted increase in temperature will not impair germination, however, the time available for seedling establishment will decrease due to lacking rainfall. The increase in the amount of small-sized seeds produced in drought years is a strategy for coping with harsh environments, rather than a decrease in seed quality.
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来源期刊
Journal of Seed Science
Journal of Seed Science Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
2.00
自引率
30.00%
发文量
28
审稿时长
12 weeks
期刊介绍: From 2017 the Journal of Seed Science (JSS) will circulate online version only. Original scientific studies and communications, not yet published or submitted to another journal for publication and written in Portuguese or English, will be accepted for publication. For manuscripts submitted in English, the authors should provide an adequated version. The SCIENTIFIC COMMUNICATION is a category of scientific manuscript which describes a technique, an equipment, new species or observations and surveys of limited results. It has the same scientific rigor as the “Scientific Articles” and the same value as a publication. The classification of a manuscript as a SCIENTIFIC COMMUNICATION is based on its content and scientific merit but it can be a preliminary study, simple and not definitive on a certain subject, with publication justified by its uniqueness and contribution to the area. The Editorial Board of the JSS may invite leading authors of recognized reputation to compose specific Review Articles covering topics of their specialization that will convey to the scientific community the state-of-the-art knowledge related to the specific theme.
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