Plant nuclear factor Y (NF-Y) B subunits confer drought tolerance and lead to improved corn yields on water-limited acres
Plant nuclear factor Y (NF-Y) B subunits confer drought tolerance and lead to improved corn yields on water-limited acres
复制标题
DOI：
10.1073/pnas.0707193104
复制
发表时间：
2007-10-16
影响因子：
11.1
通讯作者：
Heard, Jacqueline E.
中科院分区：
文献类型：
--
作者：
Nelson, Donald E.;Repetti, Peter P.;Heard, Jacqueline E.
由于作物性状的复杂性和影响产量的众多因素，在干旱条件下商业性地改善作物表现一直具有挑战性。在这里，我们报告了一个功能基因组学方法的结果，确定了一个转录因子从核因子Y（NF-Y）家族，AtNF-YB 1，它通过一个以前未描述的机制，赋予改善的性能在干旱条件下的拟南芥。一种玉米转录因子ZmNF-YB 2显示出具有相当的活性。在水分限制条件下，ZmNF-YB 2表达增加的转基因玉米植物显示出对干旱的耐受性，这是基于许多与胁迫相关的参数的响应，包括叶绿素含量、气孔导度、叶片温度、减少的萎蔫和光合作用的维持。这些胁迫适应有助于在水分有限的环境下玉米的籽粒产量优势。这项技术的应用有可能对遭受干旱的玉米生产系统产生重大影响。
Commercially improved crop performance under drought conditions has been challenging because of the complexity of the trait and the multitude of factors that influence yield. Here we report the results of a functional genomics approach that identified a transcription factor from the nuclear factor Y (NF-Y) family, AtNF-YB1, which acts through a previously unclescribed mechanism to confer improved performance in Arabidopsis under drought conditions. An orthologous maize transcription factor, ZmNF-YB2, is shown to have an equivalent activity. Under water-limited conditions, transgenic maize plants with increased ZmNF-YB2 expression show tolerance to drought based on the responses of a number of stress-related parameters, including chlorophyll content, stomatal conductance, leaf temperature, reduced wilting, and maintenance of photosynthesis. These stress adaptations contribute to a grain yield advantage to maize under water-limited environments. The application of this technology has the potential to significantly impact maize production systems that experience drought.