Auxins reverse plant male sterility caused by high temperatures
Auxins reverse plant male sterility caused by high temperatures
复制标题
DOI：
10.1073/pnas.1000869107
复制
发表时间：
2010-05-11
影响因子：
11.1
通讯作者：
Higashitani, Atsushi
中科院分区：
文献类型：
--
作者：
Sakata, Tadashi;Oshino, Takeshi;Higashitani, Atsushi
随着全球气候变暖，植物高温伤害问题日益严重。在小麦、大麦和其他各种重要的商业作物中，花药发育的早期阶段特别容易受到高温的影响。据报道，在某些植物组织中，生长素的生物合成随温度升高而激活。相比之下，我们发现高温条件下，内源生长素水平在大麦和拟南芥花药发育中特异性降低。此外，温度升高抑制了YUCCA生长素生物合成基因的表达。应用生长素完全逆转了两种植物的雄性不育。这些。研究结果表明，组织特异性生长素减少是导致花粉发育败育的主要原因。因此，生长素的应用可能有助于在未来气候变化的情况下保持作物的稳定产量。
With global warming, plant high temperature injury is becoming an increasingly serious problem. In wheat, barley, and various other commercially important crops, the early phase of anther development is especially susceptible to high temperatures. Activation of auxin biosynthesis with increased temperatures has been reported in certain plant tissues. In contrast, we here found that under high temperature conditions, endogenous auxin levels specifically decreased in the developing anthers of barley and Arabidopsis. In addition, expression of the YUCCA auxin biosynthesis genes was repressed by increasing temperatures. Application of auxin completely reversed male sterility in both plant species. These. findings suggest that tissue-specific auxin reduction is the primary cause of high temperature injury, which leads to the abortion of pollen development. Thus, the application of auxin may help sustain steady yields of crops despite future climate change.