Rice with reduced stomatal density conserves water and has improved drought tolerance under future climate conditions.
Rice with reduced stomatal density conserves water and has improved drought tolerance under future climate conditions.
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气孔密度降低的大米可以节省水，并在未来的气候条件下提高了干旱耐受性。
DOI：
10.1111/nph.15344
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发表时间：
2019-01
期刊：
影响因子：
--
通讯作者：
Gray JE
中科院分区：
文献类型：
--
作者：
Caine RS;Yin X;Sloan J;Harrison EL;Mohammed U;Fulton T;Biswal AK;Dionora J;Chater CC;Coe RA;Bandyopadhyay A;Murchie EH;Swarup R;Quick WP;Gray JE
人类大部分依赖水稻（Oryza sativa）作为食物来源，但种植是水密集型的，作物易受干旱和高温的影响。在气候变化的情况下，水供应减少和高温的时期预计将变得更加频繁，从而对水稻产量产生不利影响。我们通过操纵发育信号的水平来设计高产水稻品种'IR64'以产生更少的气孔。我们过表达水稻表皮图案形成因子OsEPF1，创造了气孔密度大幅降低，气孔导度相应降低的植物。气孔密度低的水稻品种具有较强的保水能力。在发芽后第4和5周之间为正常量的60%。当生长在大气CO2浓度升高的环境中时，气孔密度低的水稻植株能够保持气孔导度，并在干旱和高温（40°C）下存活的时间比对照植株长。气孔密度低的水稻产量相当，甚至有所提高，尽管在某些条件下光合速率降低。气孔较少的水稻植株耐旱，在用水方面更保守，在未来气候变化可能威胁粮食安全时，它们应该表现得更好。
Much of humanity relies on rice (Oryza sativa) as a food source, but cultivation is water intensive and the crop is vulnerable to drought and high temperatures. Under climate change, periods of reduced water availability and high temperature are expected to become more frequent, leading to detrimental effects on rice yields. We engineered the high‐yielding rice cultivar ‘IR64’ to produce fewer stomata by manipulating the level of a developmental signal. We overexpressed the rice epidermal patterning factor OsEPF1, creating plants with substantially reduced stomatal density and correspondingly low stomatal conductance. Low stomatal density rice lines were more able to conserve water, using c. 60% of the normal amount between weeks 4 and 5 post germination. When grown at elevated atmospheric CO 2, rice plants with low stomatal density were able to maintain their stomatal conductance and survive drought and high temperature (40°C) for longer than control plants. Low stomatal density rice gave equivalent or even improved yields, despite a reduced rate of photosynthesis in some conditions. Rice plants with fewer stomata are drought tolerant and more conservative in their water use, and they should perform better in the future when climate change is expected to threaten food security.
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影响因子：
14.9
作者：
Alexandrov N;Tai S;Wang W;Mansueto L;Palis K;Fuentes RR;Ulat VJ;Chebotarov D;Zhang G;Li Z;Mauleon R;Hamilton RS;McNally KL
通讯作者：
McNally KL
影响因子：
64.8
作者：
Keenan, Trevor F.;Hollinger, David Y.;Richardson, Andrew D.
通讯作者：
Richardson, Andrew D.
影响因子：
5.2
作者：
Gago, Jorge;Douthe, Cyril;Medrano, Hipolitd
通讯作者：
Medrano, Hipolitd
影响因子：
20.5
作者：
Engineer CB;Hashimoto-Sugimoto M;Negi J;Israelsson-Nordström M;Azoulay-Shemer T;Rappel WJ;Iba K;Schroeder JI
通讯作者：
Schroeder JI
影响因子：
9.4
作者：
Franks, Peter J.;Doheny-Adams, Timothy W.;Gray, Julie E.
通讯作者：
Gray, Julie E.