入侵植物（L.）普鲁斯基对干旱胁迫的适应性

Adaptation of the Invasive Plant (L.) Pruski to Drought Stress.

作者信息

Zhang Qilei, Wang Ye, Weng Zhilong, Chen Guangxin, Peng Changlian

机构信息

Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.

Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.

出版信息

Plants (Basel). 2024 Aug 9;13(16):2207. doi: 10.3390/plants13162207.

DOI:10.3390/plants13162207

PMID:39204643

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11360784/

Abstract

Invasive species and their hybrids with native species threaten biodiversity. However, there are few reports on the drought stress adaptability of invasive species (L.) Pruski and its hybrid with native species . In this study, relative water content (RWC), abscisic acid (ABA), reactive oxygen species, antioxidant capacity, and photosynthetic capacity were measured in the hybrid and its parents under drought stress (13% PEG-6000). Under drought stress, the ABA content and RWC in were the highest. RWC decreased by 28% in , 41% in , and 33% in the hybrid. Activities of the antioxidant enzymes in were the highest, and the accumulation of malondialdehyde (MDA) was the lowest (4.3 μg g), while it was the highest in (6.9 μg g). The maximum photochemical efficiency (F/F) of was the lowest (0.71), and it was the highest in (7.5) at 8 h under drought stress. The results suggest that the drought resistance of the hybrid was weaker than that of but stronger than that of . Therefore, the survival of may be threatened by both the invasive species and the hybrid.

摘要

入侵物种及其与本地物种的杂交种威胁着生物多样性。然而，关于入侵物种（L.）普鲁斯基及其与本地物种杂交种的干旱胁迫适应性的报道很少。在本研究中，在干旱胁迫（13% PEG - 6000）下测量了杂交种及其亲本的相对含水量（RWC）、脱落酸（ABA）、活性氧、抗氧化能力和光合能力。在干旱胁迫下，[某亲本名称]中的ABA含量和RWC最高。[某亲本名称]中的RWC下降了28%，[另一亲本名称]中下降了41%，杂交种中下降了33%。[某亲本名称]中抗氧化酶的活性最高，丙二醛（MDA）的积累最低（4.3μg g），而在[另一亲本名称]中最高（6.9μg g）。在干旱胁迫8小时时，[某亲本名称]的最大光化学效率（F/F）最低（0.71），[另一亲本名称]中最高（0.75）。结果表明，杂交种的抗旱性比[某亲本名称]弱，但比[另一亲本名称]强。因此，[某本地物种名称]的生存可能受到入侵物种[入侵物种名称]及其杂交种的双重威胁。