PANICLE PHYTOMER2 (PAP2), encoding a SEPALLATA subfamily MADS-box protein, positively controls spikelet meristem identity in rice.
PANICLE PHYTOMER2 (PAP2), encoding a SEPALLATA subfamily MADS-box protein, positively controls spikelet meristem identity in rice.
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DOI：
10.1093/pcp/pcp166
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发表时间：
2010-01
影响因子：
4.9
通讯作者：
Kyozuka J
中科院分区：
文献类型：
--
作者：
Kobayashi K;Maekawa M;Miyao A;Hirochika H;Kyozuka J
在水稻幼穗发育过程中，新的分生组织以有组织的方式连续产生，并以时间和位置依赖的方式获得其身份。在穗phytomer 2 -1（pap 2 -1）突变体的穗中，分生组织起始的模式是混乱的，新形成的分生组织表现出降低的能力，成为小穗分生组织，导致早期产生的小穗转化为轴分支。此外，不发育颖片和不育外稃，小穗的最外器官，拉长成一多叶形态。我们认为，PAP 2是小穗分生组织身份的正调控因子。图位克隆结果表明，PAP 2编码MADS 34，是MADS-box蛋白SEPALLATA（SEP）亚家族的成员。PAP 2/OsMADS 34属于MADS-box基因的LOFSEP亚组，其显示由基因复制事件引起的草特异性多样化。水稻SEP亚家族的5个基因都只在幼穗发育过程中表达，但它们的时空表达模式各不相同。PAP 2的表达开始最早的五个SEP基因，和低，但显着水平的PAP 2 mRNA检测到花序分生组织，在分支分生组织后立即过渡，在颖片原基，与其在小穗形成的早期发展的作用相一致。我们的研究提供了新的证据支持这一假设，即LOFSEP亚组的基因控制的发育过程是独特的草物种。
In rice panicle development, new meristems are generated sequentially in an organized manner and acquire their identity in a time- and position-dependent manner. In the panicle of the panicle phytomer2-1 (pap2-1) mutant, the pattern of meristem initiation is disorganized and newly formed meristems show reduced competency to become spikelet meristems, resulting in the transformation of early arising spikelets into rachis branches. In addition, rudimentary glumes and sterile lemmas, the outermost organs of the spikelet, elongate into a leafy morphology. We propose that PAP2 is a positive regulator of spikelet meristem identity. Map-based cloning revealed that PAP2 encodes OsMADS34, a member of the SEPALLATA (SEP) subfamily of MADS-box proteins. PAP2/OsMADS34 belongs to the LOFSEP subgroup of MADS-box genes that show grass-specific diversification caused by gene duplication events. All five SEP subfamily genes in rice are expressed exclusively during panicle development, while their spatial and temporal expression patterns vary. PAP2 expression starts the earliest among the five SEP genes, and a low but significant level of PAP2 mRNA was detected in the inflorescence meristem, in branch meristems immediately after the transition, and in glume primordia, consistent with its role in the early development of spikelet formation. Our study provides new evidence supporting the hypothesis that the genes of the LOFSEP subgroup control developmental processes that are unique to grass species.
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大米中的MADS-box基因家族：在生殖发育和压力期间，全基因组识别，组织和表达分析。
影响因子：
4.4
作者：
Arora, Rita;Agarwal, Pinky;Ray, Swatismita;Singh, Ashok Kumar;Singh, Vijay Pal;Tyagi, Akhilesh K.;Kapoor, Sanjay
通讯作者：
Kapoor, Sanjay
DOI：
10.1111/j.1365-313x.2008.03710.x
发表时间：
2009-02
期刊：
The Plant journal : for cell and molecular biology
影响因子：
--
作者：
Li H;Xue D;Gao Z;Yan M;Xu W;Xing Z;Huang D;Qian Q;Xue Y
通讯作者：
Xue Y
影响因子：
5.1
作者：
Lim, J;Moon, YH;Jang, SK
通讯作者：
Jang, SK
影响因子：
2.7
作者：
Ikeda, K;Nagasawa, N;Nagato, Y
通讯作者：
Nagato, Y
影响因子：
7.2
作者：
Lee, Dong-Yeon;Lee, Jinwon;An, Gynheung
通讯作者：
An, Gynheung