Grape SISTER OF RAMOSA3 is a negative regulator of pedicel development of grape inflorescence
Grape SISTER OF RAMOSA3 is a negative regulator of pedicel development of grape inflorescence
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DOI：
10.1007/s11240-015-0884-2
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发表时间：
2016-01-01
影响因子：
3
通讯作者：
Suzuki, Shunji
中科院分区：
文献类型：
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作者：
Ishiai, Shiho;Nakajima, Yuko;Suzuki, Shunji
本文报道了葡萄花梗发育与葡萄RAMOSA3姐妹基因(VvSRA)表达的关系。葡萄幼穗中VvSRA的表达增加，而RAMOSA3的表达没有增加，减少了葡萄花序侧枝上的花梗数目。这表明VvSRA对葡萄花序侧枝的花梗发育具有负性调节作用，从而减少了大量表达VvSRA的葡萄品种花序上的浆果数。同样，VvSRA的过表达减少了拟南芥二次枝条上的花蕾数量。此外，VvSRA的过表达对拟南芥的植株表型有显著影响，如花更小，花序更短，叶片膨大。由于VvSRA编码海藻糖6-磷酸磷酸酶，VvSRA的过表达可能会降低转基因拟南芥中6-磷酸海藻糖的表达，从而引起表型变化。这些发现可能为研究葡萄的形态发生提供新的信息，包括RAMOSA3姐妹的花梗发育和海藻糖代谢。
We report here the relationship between pedicel development and grape SISTER OF RAMOSA3 (VvSRA) expression in grapevine. The increase in VvSRA expression, but not grape RAMOSA3 expression, in young grape inflorescence decreased the number of pedicels on the lateral branch of grape inflorescence. This suggests that VvSRA negatively regulates pedicel development on the lateral branch of grape inflorescence, thereby decreasing berry number on a bunch in cultivars expressing VvSRA abundantly. Similarly, VvSRA overexpression decreased the number of flower buds on secondary branch in Arabidopsis plants. In addition, VvSRA overexpression had notable effects on Arabidopsis plant phenotypes, such as smaller flowers, shorter inflorescence, and expanded rosette leaves. As VvSRA encodes a trehalose 6-phosphate phosphatase, VvSRA overexpression might decrease trehalose 6-phosphate in the transgenic Arabidopsis plants, thereby causing the phenotypical alternations. These findings may provide new information on grapevine morphogenesis including pedicel development by SISTER OF RAMOSA3 and trehalose metabolism.