ABA-inducible DEEPER ROOTING 1 improves adaptation of maize to water deficiency.
ABA-inducible DEEPER ROOTING 1 improves adaptation of maize to water deficiency.
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ABA — 诱导型 DEEPER ROOTING 1 提高玉米对缺水的适应能力
DOI：
10.1111/pbi.13889
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发表时间：
2022-11
影响因子：
13.8
通讯作者：
Lu, Yanli
中科院分区：
文献类型：
--
作者：
Feng, Xuanjun;Jia, Li;Cai, Yunting;Guan, Huarui;Zheng, Dan;Zhang, Weixiao;Xiong, Hao;Zhou, Hanmei;Wen, Ying;Hu, Yue;Zhang, Xuemei;Wang, Qingjun;Wu, Fengkai;Xu, Jie;Lu, Yanli
根构型重塑对于水分有限土壤中的饲料水分至关重要。据报道，水稻、拟南芥和李属植物中的深根1（DRO 1）通过促进根向下生长并从深层土壤中获取水分来改善干旱回避。在本研究中，我们发现ZmDRO 1更强烈地响应脱落酸（阿坝）/干旱诱导玉米ssp。mexicana，一个祖先种的栽培玉米，比在B73。这可能是玉米之所以具有较强的抗旱性的原因之一。墨西哥在缺水条件下，根向下的方向角度变化更明显，生物量损失更少。因此，使用稳健的合成阿坝/干旱诱导型启动子来控制ZmDRO 1 B73在拟南芥和栽培玉米中的表达以进行抗旱育种。有趣的是，阿坝诱导的ZmDRO 1促进了更大的向下根角，并在水分限制条件下将谷物产量提高了40%以上。总的来说，这些结果揭示了ZmDRO 1对阿坝/干旱诱导的不同反应赋予了不同的干旱回避能力，并且我们证明了ZmDRO 1通过阿坝诱导策略改变现代玉米的根构型以改善田间干旱适应的应用。
Root architecture remodelling is critical for forage moisture in water‐limited soil. DEEPER ROOTING 1 (DRO1) in Oryza, Arabidopsis, and Prunus has been reported to improve drought avoidance by promoting roots to grow downward and acquire water from deeper soil. In the present study, we found that ZmDRO1 responded more strongly to abscisic acid (ABA)/drought induction in Zea mays ssp. mexicana, an ancestral species of cultivated maize, than in B73. It was proposed that this is one of the reasons why Zea mays ssp. mexicana has a more noticeable change in the downward direction angle of the root and fewer biomass penalties under water‐deficient conditions. Thus, a robust, synthetic ABA/drought‐inducible promoter was used to control the expression of ZmDRO1 B73 in Arabidopsis and cultivated maize for drought‐resistant breeding. Interestingly, ABA‐inducible ZmDRO1 promoted a larger downward root angle and improved grain yield by more than 40% under water‐limited conditions. Collectively, these results revealed that different responses to ABA/drought induction of ZmDRO1 confer different drought avoidance abilities, and we demonstrated the application of ZmDRO1 via an ABA‐inducible strategy to alter the root architecture of modern maize to improve drought adaptation in the field.
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影响因子：
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