Parallel expression evolution of oxidative stress-related genes in fiber from wild and domesticated diploid and polyploid cotton (Gossypium).
Parallel expression evolution of oxidative stress-related genes in fiber from wild and domesticated diploid and polyploid cotton (Gossypium).
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DOI：
10.1186/1471-2164-10-378
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发表时间：
2009-08-17
期刊：
影响因子：
4.4
通讯作者：
Wendel JF
中科院分区：
文献类型：
--
作者：
Chaudhary B;Hovav R;Flagel L;Mittler R;Wendel JF
活性氧（Reactive oxygen species，ROS）在植物体内信号转导和细胞内环境稳定中起着重要作用。然而，ROS的产生和消除之间的不平衡可引起生长细胞中的氧化应激。由于ROS对细胞生长很重要，因此ROS调节可能对植物中天然或人类介导的选择压力有反应。为了研究单个植物细胞中氧化应激相关基因的进化，我们使用系统发育方法对棉花（棉属）的伸长种子毛状体（“纤维”）进行了比较表达谱分析。我们使用询问42，429个unigenes的微阵列平台，测量了二倍体祖先物种趋异、异源多倍体形成以及二倍体和异源多倍体物种平行驯化过程中的表达变化。差异表达基因在二倍体祖先物种中的分布揭示了驯化的G.植物园同样，在两个独立驯化的异源多倍体物种（G。和海岛棉G. hirsutum）的抗氧化剂基因与先前的野生型相比显著上调。与此相反，三个野生异源多倍体物种的分析表明，基因组合并和古老的异源多倍体的形成没有显着影响的ROS相关基因的调控。值得注意的是，许多诊断为可能的目标选择的ROS相关的过程中，二倍体和异源多倍体栽培共享，但涉及不同的抗氧化基因。我们的数据表明，在几个地理上广泛分布的驯化棉花物种中，平行的人类选择增强纤维生长导致了细胞氧化还原水平被调节的方式的相似和重叠的代谢转化。
Reactive oxygen species (ROS) play a prominent role in signal transduction and cellular homeostasis in plants. However, imbalances between generation and elimination of ROS can give rise to oxidative stress in growing cells. Because ROS are important to cell growth, ROS modulation could be responsive to natural or human-mediated selection pressure in plants. To study the evolution of oxidative stress related genes in a single plant cell, we conducted comparative expression profiling analyses of the elongated seed trichomes ("fibers") of cotton (Gossypium), using a phylogenetic approach. We measured expression changes during diploid progenitor species divergence, allopolyploid formation and parallel domestication of diploid and allopolyploid species, using a microarray platform that interrogates 42,429 unigenes. The distribution of differentially expressed genes in progenitor diploid species revealed significant up-regulation of ROS scavenging and potential signaling processes in domesticated G. arboreum. Similarly, in two independently domesticated allopolyploid species (G. barbadense and G. hirsutum) antioxidant genes were substantially up-regulated in comparison to antecedent wild forms. In contrast, analyses of three wild allopolyploid species indicate that genomic merger and ancient allopolyploid formation had no significant influences on regulation of ROS related genes. Remarkably, many of the ROS-related processes diagnosed as possible targets of selection were shared among diploid and allopolyploid cultigens, but involved different sets of antioxidant genes. Our data suggests that parallel human selection for enhanced fiber growth in several geographically widely dispersed species of domesticated cotton resulted in similar and overlapping metabolic transformations of the manner in which cellular redox levels have become modulated.
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影响因子：
56.9
作者：
Dillehay, Tom D.;Rossen, Jack;Williams, David E.
通讯作者：
Williams, David E.
影响因子：
9.4
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Li, Hong-Bin;Qin, Yong-Mei;Zhu, Yu-Xian
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Zhu, Yu-Xian
影响因子：
7.2
作者：
Mittler, R;Merquiol, E;Cohen, M
通讯作者：
Cohen, M
影响因子：
7.4
作者：
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影响因子：
11.6
作者：
Davletova, S;Rizhsky, L;Mittler, R
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