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赤霉素 A1 代谢有助于控制马铃薯光周期介导的块茎形成。

Gibberellin A1 metabolism contributes to the control of photoperiod-mediated tuberization in potato.

机构信息

Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB, Bellaterra, Spain.

出版信息

PLoS One. 2011;6(9):e24458. doi: 10.1371/journal.pone.0024458. Epub 2011 Sep 22.

DOI:10.1371/journal.pone.0024458
PMID:21961036
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3178525/
Abstract

Some potato species require a short-day (SD) photoperiod for tuberization, a process that is negatively affected by gibberellins (GAs). Here we report the isolation of StGA3ox2, a gene encoding a GA 3-oxidase, whose expression is increased in the aerial parts and is repressed in the stolons after transfer of photoperiod-dependent potato plants to SD conditions. Over-expression of StGA3ox2 under control of constitutive or leaf-specific promoters results in taller plants which, in contrast to StGA20ox1 over-expressers previously reported, tuberize earlier under SD conditions than the controls. By contrast, StGA3ox2 tuber-specific over-expression results in non-elongated plants with slightly delayed tuber induction. Together, our experiments support that StGA3ox2 expression and gibberellin metabolism significantly contribute to the tuberization time in strictly photoperiod-dependent potato plants.

摘要

一些马铃薯品种需要短日照（SD）光周期才能进行块茎形成，这一过程受到赤霉素（GAs）的负面影响。在这里，我们报告了 StGA3ox2 的分离，StGA3ox2 是一个编码 GA 3-氧化酶的基因，其表达在将依赖光周期的马铃薯植株转移到 SD 条件后，在地上部分增加，在匍匐茎中受到抑制。在组成型或叶特异性启动子的控制下过表达 StGA3ox2 会导致植株更高，与之前报道的 StGA20ox1 过表达植株相比，在 SD 条件下比对照更早地形成块茎。相比之下，StGA3ox2 块茎特异性过表达导致块茎诱导稍有延迟的非伸长植物。总之，我们的实验支持 StGA3ox2 的表达和赤霉素代谢显著影响严格依赖光周期的马铃薯植株的块茎形成时间。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/aebedf4c98d4/pone.0024458.g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/1188f07def10/pone.0024458.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/d51353a165c3/pone.0024458.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/d1225039df50/pone.0024458.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/f87ed1fd99e3/pone.0024458.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/9c4fd2672cdd/pone.0024458.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/f59c1b8551af/pone.0024458.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/aebedf4c98d4/pone.0024458.g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/1188f07def10/pone.0024458.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/d51353a165c3/pone.0024458.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/d1225039df50/pone.0024458.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/f87ed1fd99e3/pone.0024458.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/9c4fd2672cdd/pone.0024458.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/f59c1b8551af/pone.0024458.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0b20/3178525/aebedf4c98d4/pone.0024458.g007.jpg

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