Seed thermo-priming accelerates the growth of Ceiba glaziovii (Kutze) K.Schum. seedlings

IF 1.5 4区农林科学 Q2 FORESTRY

New Zealand Journal of Forestry Science Pub Date : 2024-03-05 DOI:10.33494/nzjfs542024x264x

José Laurindo dos Santos Júnior, Elizamar Ciríaco da Silva

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引用次数: 0

Abstract

Background: Global climate changes have caused temperature increases that can harm plant development, especially the initial growth and establishment of seedlings for the recovery of degraded areas. However, there are species in which these losses are attenuated when the seeds are thermo-primed to sublethal temperatures. Therefore, the objective of the present study was to evaluate the influence of seed heat conditioning on germination and initial growth of Ceiba glaziovii (Kuntze) K. Schum seedlings, an endemic species occurring in seasonally tropical dry forest in Brazil. Methods: Seeds of C. glaziovii were exposed to 70 oC for 15, 30, 45, 60 and 90 minutes as pre-germination treatments. The control did not undergo heat treatment. Germination variables, vegetative growth, survival rate and normal leaves were evaluated. Results: Thermo-priming negatively affected the germination proportion of C. glaziovii seeds with increasing exposure time. However, it significantly enhanced vegetative growth and seedling survival rate of this species after transplanting, without impairing the formation of normal leaves. Conclusions: Thermo-priming of seeds was found to produce more vigorous seedlings of Ceiba glaziovii.

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种子热预热可加速Ceiba glaziovii (Kutze) K.Schum.幼苗的生长

背景：全球气候变化导致气温升高，会损害植物的生长发育，尤其是用于退化地区恢复的幼苗的初期生长和成活。然而，有些物种的种子在亚致死温度下进行热预处理后，这些损失会减小。因此，本研究的目的是评估种子热调节对巴西季节性热带干旱森林特有物种 Ceiba glaziovii (Kuntze) K. Schum幼苗萌发和初期生长的影响：方法：将 C. glaziovii 种子置于 70 oC 温度下 15、30、45、60 和 90 分钟，作为发芽前处理。对照组未进行热处理。对发芽变量、无性生长、存活率和正常叶片进行了评估：结果：随着暴露时间的增加，热催芽对 C. glaziovii 种子的发芽率有负面影响。结果：随着暴露时间的增加，热催芽对 C glaziovii 种子的发芽率有负面影响，但却能明显提高该物种移植后的无性生长和幼苗成活率，且不影响正常叶片的形成：结论：对种子进行热催芽可培育出生命力更强的 Ceiba glaziovii 幼苗。

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

New Zealand Journal of Forestry Science FORESTRY-

CiteScore

2.20

自引率

13.30%

发文量

审稿时长

39 weeks

期刊介绍： The New Zealand Journal of Forestry Science is an international journal covering the breadth of forestry science. Planted forests are a particular focus but manuscripts on a wide range of forestry topics will also be considered. The journal''s scope covers forestry species, which are those capable of reaching at least five metres in height at maturity in the place they are located, but not grown or managed primarily for fruit or nut production.