沙漠玫瑰花粉粒的活力与柱头的可接受性

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Cristiane Gonçalves Souza, S. Ramos, S. Nietsche, C. C. F. Possobom, E. Almeida, M. C. Pereira
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引用次数: 3

摘要

摘要Adenium obesum(Forssk.)Roem.&舒尔特。,俗称沙漠玫瑰,已成为一种珍贵的观赏植物。在花卉栽培中,杂交种的生产是优先考虑的。因此,了解目标物种的花生物学和有性繁殖是至关重要的。本研究的目的是:(1)测试蔗糖浓度和温度对A.obesum花粉粒体外发芽的影响;(2) 鉴定温度对A.obesum花粉粒活力的影响;(3)对3份A.obesum材料的花粉粒活力和柱头可接受性进行了研究。在体外发芽试验中观察到温度和蔗糖浓度之间的显著关系。花粉粒的体外发芽率最高,为39.81%,估计温度为26.05°C。沙漠玫瑰材料在30°C的生化需氧量(BOD)室中维持16小时的光照周期,开花速度更快,温度≥25°C诱导花粉粒活力百分比超过69%。温度是最重要的非生物因素之一,主要影响花粉萌发、花粉管生长和受精效率。在人工授粉中,ICA wd的加入是一个突出的花粉供体。花的柱头从开花前一天到开花后三天都能接受。上述两个参数,柱头可接受性和花粉活力,可以推断沙漠玫瑰成功授粉和随后受精的适当时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Viability of pollen grains and stigma receptivity in Desert Rose
Abstract Adenium obesum (Forssk.) Roem. & Schult., popularly known as desert rose, has become a valuable ornamental plant. In floriculture, the production of hybrids is prioritized. Hence, knowledge on floral biology and sexual reproduction of the target species is fundamental. The objectives of this study were: (1) to test sucrose concentrations and temperatures for in vitro germination of A. obesum pollen grains; (2) to identify the effect of temperature on the viability of A. obesum pollen grains; and (3) to evaluate the viability of pollen grains and stigma receptivity in pre-anthesis, at flower opening, and 72 h post-flower opening in three accessions of A. obesum. A significant relationship between temperatures and sucrose concentrations was observed in the in vitro germination test. The highest percentage of in vitro germination of pollen grains, 39.81%, was observed at an estimated temperature of 26.05 °C. Desert rose accessions maintained in biochemical oxygen demand (BOD) chambers at 30 °C during a 16-h light photoperiod showed faster flowering, and temperatures ≥ 25 °C induced pollen grain viability percentages above 69%. Temperature is one of the most important abiotic factors, influencing mainly in pollen germination, pollen tube growing and in efficiency fertilization. The ICA-wd accession stood out and can be considered a pollen donor in artificial pollination. The stigmas of flowers were receptive from a day before flower opening until three days after. The two parameters presented above, stigma receptivity and pollen viability, allow inferences about the appropriate time for successful pollination and subsequent fertilization in desert roses.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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