Under ground: what pH favors germination and the root growth of Zeyheria tuberculosa (Vell.) Bureau ex Verl.

IF 0.9 4区生物学 Q4 PLANT SCIENCES

Acta Botanica Brasilica Pub Date : 2023-01-01 DOI:10.1590/1677-941x-abb-2023-0116

Ana Maria Oliveira Ferreira, Tais Torres, Lissa Vasconcelos Vilas Boas, Elisa Monteze Bicalho

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引用次数: 0

Abstract

This work aimed to examine the germination and initial growth of Zeyheria tuberculosa (Vell.) Bureau ex Verl. seedlings at different pH values. pH of the deionized water was adjusted with hydrochloric acid and/or sodium hydroxide to 4.7, 5.7, 6.7, 7.7 and 8.7. The following parameters were evaluated: final germination percentage (GP), germination speed index, time required for 50% germination, germination rate, viability of the remaining seeds and length of the radicle. All parameters were reduced in alkaline pH. Maximum germination of 94% was reached in the treatment control, followed by pH 4.7. At alkaline pH (7.7 - 8.7), GP was 43 and 31%, respectively. Therefore, at these pHs, germination was reduced. We provided direct evidence that pH is a limiting factor for germination and for the radicle growth of Z. tuberculosa seedlings. In addition, we show experimental evidence of why this species is widely distributed in the Cerrado biome, where the soils are more acidic, and the relationship between soil composition and high germination in acidic medium was corroborated with this study. We suggest that the germination test at different pHs be included in reforestation programs with native species to predict the establishment of seedlings in soils with different pH.

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地下:什么样的pH值有利于Zeyheria tuberlosa的发芽和根系生长。前总督局

本研究旨在研究结核Zeyheria tuberlosa (Vell.)的萌发和初始生长。前总督局不同pH值的幼苗。用盐酸和/或氢氧化钠调节去离子水的pH为4.7、5.7、6.7、7.7和8.7。测定了最终发芽率(GP)、发芽速度指数、50%萌发所需时间、发芽率、剩余种子活力和胚根长度。在pH值为4.7的处理下，发芽率最高，达到94%。在碱性pH(7.7 ~ 8.7)下，GP分别为43%和31%。因此，在这些ph值下，发芽率降低。我们提供了直接证据，证明pH是结核分枝杆菌幼苗发芽和根生长的限制因素。此外，我们展示了实验证据，为什么该物种广泛分布在Cerrado生物群系中，那里的土壤酸性更强，土壤成分与酸性培养基中高发芽率之间的关系得到了本研究的证实。我们建议将不同pH值的发芽试验纳入本地树种造林计划中，以预测不同pH值土壤中幼苗的成活率。

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

Acta Botanica Brasilica PLANT SCIENCES-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

6-12 weeks

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