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茄科中单一结构域亲环蛋白的丰度受器官类型和高温调控,而非其他环境因素的影响。

The abundance of a single domain cyclophilin in Solanaceae is regulated as a function of organ type and high temperature and not by other environmental constraints.

作者信息

Kiełbowicz-Matuk Agnieszka, Rey Pascal, Rorat Tadeusz

机构信息

Commissariat à l'Energie Atomique Cadarache, Direction des Sciences du Vivant, Département d'Ecophysiologie Végétale et de Microbiologie, Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479 Poznan, Poland.

出版信息

Physiol Plant. 2007 Nov;131(3):387-98. doi: 10.1111/j.1399-3054.2007.00968.x.

Abstract

The abundance of a single domain cyclophilin (CyP), designated as SsCyP, was investigated in Solanum sogarandinum and Solanum tuberosum plants during development and in response to various environmental constraints. We show that under control conditions, SsCyP is distributed throughout the plant but in an organ-specific manner. In both Solanum species, the highest protein levels are observed in transporting organs and in tubers, and substantial amounts are noticed in open flowers and in stamens. We also show that the SsCyP abundance in leaves strongly decreases with age. In in vitro-grown plantlets of S. sogarandinum, the SsCyP gene is induced by low temperature at the transcript level but not at the protein level, indicating that post-transcriptional mechanisms control SsCyP expression under cold conditions. In in vivo-grown Solanum plants, the organ-dependent SsCyP protein distribution and abundance are not modified by cold, drought, salinity and photooxidative treatments. In contrast, the protein abundance substantially decreases in all organs of Solanum plants subjected to heat shock. We conclude that the SsCyP protein acts mainly during development and does not belong to the group of stress-induced CyPs.

摘要

研究了一种名为SsCyP的单结构域亲环蛋白(CyP)在发育过程中以及对各种环境胁迫响应时,在苏氏茄和马铃薯植株中的丰度。我们发现,在对照条件下,SsCyP在整株植物中均有分布,但具有器官特异性。在这两种茄科植物中,在运输器官和块茎中观察到最高的蛋白质水平,在开放的花朵和雄蕊中也有大量表达。我们还发现,叶片中SsCyP的丰度会随着叶片年龄的增长而显著降低。在苏氏茄的离体培养苗中,低温在转录水平上诱导SsCyP基因表达,但在蛋白质水平上没有诱导,这表明在寒冷条件下,转录后机制控制着SsCyP的表达。在活体生长的茄科植物中,依赖器官的SsCyP蛋白质分布和丰度不受寒冷、干旱、盐度和光氧化处理的影响。相反,遭受热激处理的茄科植物所有器官中的蛋白质丰度均显著降低。我们得出结论,SsCyP蛋白主要在发育过程中起作用,不属于胁迫诱导的CyP组。

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