较高的PEPC活性和脉密度有助于提高水分胁迫下棉花叶片水分利用效率。

IF 3.6 3区 生物学 Q1 PLANT SCIENCES Plant Biology Pub Date : 2026-04-17 Epub Date: 2025-01-23 DOI:10.1111/plb.13765
Z. Lei, J. Han, X. Yi, X. Luo, W. Zhang, D. He, C. Gong, Y. Zhang
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引用次数: 0

摘要

C4光合途径的植物比C3代谢的植物更能抵抗水分胁迫。然而,干旱棉花叶片是否能初步激活C4光合作用,以及这是否有助于提高水分利用效率(WUE),目前尚不清楚。以陆地棉(Gossypium hirsutum L., Xinluzao45)为材料,测定了水分充足、轻度和中度水分胁迫下的气体交换、气孔和静脉解剖、磷酸烯醇丙酮酸羧激酶(PEPC)和Rubisco酶活性以及碳同位素组成(δ13C)。水分胁迫导致光合作用、气孔导度和Rubisco活性降低,而叶脉密度(VD)、PEPC活性和水分利用效率升高。δ13C与VD和PEPC活性的相关性表明,它们通过初步诱导C4光合途径共同促进了叶片水分利用效率的提高。通过增加PEPC酶和叶脉的初步C4光合作用为提高叶片水分利用效率提供了有效途径,并可能有助于适应不利的生长条件。
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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Higher PEPC activity and vein density contribute to improve cotton leaf water use efficiency under water stress

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来源期刊
Plant Biology
Plant Biology 生物-植物科学
CiteScore
8.20
自引率
2.60%
发文量
109
审稿时长
3 months
期刊介绍: Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.
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