Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress

IF 4.2 3区 生物学 Q1 PLANT SCIENCES Plant Biology Pub Date : 2024-04-03 DOI:10.1111/plb.13640
V. Vives-Peris, A. Gómez-Cadenas, R. M. Pérez-Clemente
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脯氨酸积累和抗氧化反应是柑橘耐受紫外线 B 诱导的胁迫的关键
植物面临着各种生物和非生物胁迫条件,而气候变化又进一步加剧了这些条件。在这些胁迫因素中,强度和波长范围增加的辐照会导致有害影响,如叶绿素降解、PSII 反应中心破坏、产生 ROS、植物新陈代谢改变,甚至植物死亡。在此,我们研究了两种柑橘基因型--Citrus macrophylla(CM)和 Troyer citrange(TC)--对紫外线-B 光诱导胁迫的反应,将两种基因型的植株在对照和紫外线-B 胁迫条件下分别生长 5 天,以评估它们的耐受机制。TC幼苗对紫外线-B光的敏感性高于CM幼苗,因为它们表现出更多的损伤和更高水平的氧化伤害(以MDA的积累为标志)。相比之下,CM幼苗表现出特定的适应机制,包括在胁迫条件下积累更高水平的脯氨酸,以及抗氧化能力的增强,抗坏血酸过氧化物酶活性的提高和 CsAPX2 基因的上调就是证明。两种基因型的植物激素积累模式相似,在紫外线-B 光照下 ABA 含量降低。此外,在耐受性 CM 幼苗中,参与光感知和响应的基因的表达受到了特别影响,CsHYH/CsHY5 和 CsRUP1-2 基因的表达较高。这些发现强调了抗氧化系统对遭受 UV-B 光诱导胁迫的柑橘类植物的重要性,并表明 CsHYH/CsHY5 和 CsRUP1-2 可被视为与耐受此类挑战性条件相关的基因。
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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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