Germinative potential of ‘Pata-de-Vaca’ seeds at different maturation stages under various temperatures

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-09-01 DOI:10.1590/2447-536x.v28i3.2505

H. R. Guariz, G. D. Shimizu, J. C. B. Paula, H. V. Sperandio, R. Marubayashi

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引用次数: 1

Abstract

Abstract Bauhinia monandra Kurz has ornamental characteristics as the shape of its crown and the exuberance of its flowering, being and is widely cultivated in urban afforestation in Brazilian regions. The production of forest seedlings is essential not only to meet the demand of urban afforestation, but also to conserve forests. However, studies on B. monandra regarding the degree of fruit maturity on seed performance are scarce. Thus, the objective of the current work was to verify the germination potential of B. monandra seeds at different stages of maturation at five constant temperatures. The germination percentage, germination speed index (GSI), mean germination time (t), relative germination frequency, and mean germination speed (MGS) were evaluated. Initially, the mature seeds had a water content of 8.5% and the immature seeds of 68.3%. Mature seeds reached high germination percentages, above 96% for temperatures of 25, 30, and 35 ºC. The immature seeds demonstrated low germination percentages, reaching the highest percentage of 33% for the temperature of 25 ºC, followed by the temperatures of 30 ºC and 35 ºC, with respective percentages of 32% and 20%. Mature seeds demonstrated the highest GSI value (11.79) for the estimated temperature of 26.94 ºC and immature seeds the highest value of t (7.85) for the temperature of 26.56 ºC. It is concluded that mature seeds aggregate higher germination at an estimated temperature of 24.72 ºC and that immature seeds present unsatisfactory germination performance.

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不同温度条件下不同成熟期“白豆”种子的萌发势

库尔兹紫荆花(Bauhinia monandra Kurz)具有花冠形状和花期旺盛的观赏特点，在巴西地区的城市绿化中被广泛种植。森林苗木的生产不仅是满足城市造林的需要，而且是保护森林的必要条件。然而，关于山楂果实成熟程度对种子性能影响的研究却很少。因此，本研究的目的是验证五种恒温条件下不同成熟阶段的山楂种子的萌发潜力。测定发芽率、发芽速度指数(GSI)、平均发芽时间(t)、相对发芽频率和平均发芽速度(MGS)。初始成熟种子含水量为8.5%，未成熟种子含水量为68.3%。成熟种子在25、30和35℃的温度下萌发率都很高，达到96%以上。未成熟种子发芽率低，25℃时最高，发芽率为33%，其次为30℃和35℃，发芽率分别为32%和20%。成熟种子在26.94℃时GSI值最高(11.79)，未成熟种子在26.56℃时GSI值最高(7.85)。结果表明，成熟种子在24.72℃时萌发率较高，未成熟种子萌发率较低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.