Thermogenesis in skunk cabbage (Symplocarpus renifolius): New insights from the ultrastructure and gene expression profiles
Thermogenesis in skunk cabbage (Symplocarpus renifolius): New insights from the ultrastructure and gene expression profiles
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DOI：
10.13128/ahs-22797
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发表时间：
2014-06
影响因子：
--
通讯作者：
Yasuko Ito-Inaba
中科院分区：
文献类型：
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作者：
Yasuko Ito-Inaba
花的产热作用已在几种植物中发现。一种温度调节植物，东亚臭鼬甘蓝（Symplocarpus renifolius）的肉穗花序可以在几天内保持其温度在22-26°C左右，即使环境温度福尔斯降至冰点以下。臭鼬甘蓝花序发育有两个主要阶段：产热雌性阶段和非产热雄性阶段;在前者中，肉穗花序可以产生大量的热量，而在后者中，产热是不可检测的。根据以往的研究，植物组织和细胞中的产热与线粒体丰度呈正相关，参与细胞呼吸和线粒体功能的基因在雌性阶段显著增强。总之，这些发现表明，在产热组织中观察到的呼吸或线粒体丰度增加可能归因于特定基因的高表达。本文综述了臭鼬甘蓝花穗在雌雄转换过程中细胞内结构和基因表达谱的变化，并提出了花发育过程中每个阶段所必需的可能过程。
Floral thermogenesis has been found in several plant species. The spadix of one thermoregulatory plant, the Eastern Asian skunk cabbage ( Symplocarpus renifolius), can maintain its temperature at approximately 22-26°C for several days, even when the ambient temperature falls below freezing. There are two major stages in skunk cabbage inflorescence development: the thermogenic female stage and the non-thermogenic male stage; in the former the spadix can produce massive amounts of heat, whereas in the latter, thermogenesis is undetectable. Based on previous studies, there is a positive correlation between heat production and the abundance of mitochondria in plant tissues and cells, and genes involved in cellular respiration and mitochondrial function are significantly enhanced at the female stage. Taken together, these findings suggest that the increased respiration or mitochondrial abundance observed in thermogenic tissues may be attributable to the high expression of specific genes. This review summarizes new insights into the changes in intracellular structures and gene expression profiles of skunk cabbage spadices during the female-male transition and proposes possible processes that are essential for each stage during floral development.