Defect in non-yellow coloring 3, an α/β hydrolase-fold family protein, causes a stay-green phenotype during leaf senescence in rice
Defect in non-yellow coloring 3, an α/β hydrolase-fold family protein, causes a stay-green phenotype during leaf senescence in rice
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DOI：
10.1111/j.1365-313x.2009.03919.x
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发表时间：
2009-09-01
期刊：
影响因子：
7.2
通讯作者：
Kusaba, Makoto
中科院分区：
文献类型：
--
作者：
Morita, Ryouhei;Sato, Yutaka;Kusaba, Makoto
P>；叶绿素降解是植物衰老过程中的重要现象。在叶片衰老过程中，某些叶绿素蛋白复合体和类囊体膜的降解是必需的。在叶片衰老过程中保持绿色的突变体被称为“保绿”突变体。非功能型保绿突变体具有叶绿素降解缺陷，在衰老过程中保持绿色，但不具有叶片功能。在这里，我们报道了一个新的水稻保绿突变体NYC3。与野生型相比，NYC3保持了较高的叶绿素a和叶绿素b含量，但在暗培养过程中其他衰老参数有所下降，表明它是一个无功能的保绿突变体。此外，还含有少量的叶绿素a，一种不含镁的叶绿素a-衍生物
P>Chlorophyll degradation is an important phenomenon in the senescence process. It is necessary for the degradation of certain chlorophyll-protein complexes and thylakoid membranes during leaf senescence. Mutants retaining greenness during leaf senescence are known as 'stay-green' mutants. Non-functional type stay-green mutants, which possess defects in chlorophyll degradation, retain greenness but not leaf functionality during senescence. Here, we report a new stay-green mutant in rice, nyc3. nyc3 retained a higher chlorophyll a and chlorophyll b content than the wild-type but showed a decrease in other senescence parameters during dark incubation, suggesting that it is a non-functional stay-green mutant. In addition, a small amount of pheophytin a, a chlorophyll a-derivative without Mg