The impact of growth at elevated [CO2] on stomatal anatomy and behavior differs between wheat species and cultivars.
The impact of growth at elevated [CO2] on stomatal anatomy and behavior differs between wheat species and cultivars.
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升高[CO2]对气孔解剖结构和行为的影响在小麦和品种之间有所不同。
DOI：
10.1093/jxb/erad011
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发表时间：
2023-04-27
影响因子：
6.9
通讯作者：
中科院分区：
文献类型：
--
作者：
高浓度的[CO2]对小麦优良品种和野生种质的气孔特征有不同的影响，导致野生亲缘种的气孔运动速度更快，这一特征有助于提高光合作用和水分利用。植物对环境变化的反应能力对它们的生存和繁殖成功至关重要。在所有气候变化情景下，由气孔的行为和发育反应调节的大气二氧化碳浓度(a[CO2])增加对作物生长的影响仍然是一个令人担忧的问题，并可能对未来的粮食安全产生影响。为了确定可用于未来育种的可能的有益性状，对6个小麦近缘种质(包括节节麦、大麦)的气孔大小和密度等形态性状的表型变异以及生理反应以及生长[CO2]对这些性状的影响进行了评估。Dicoccoides和T.turgiumSSP.Dicocon)和5个优质面包小麦品种。利用一系列不同的物种和倍性，我们确定了优良六倍体小麦和小麦近缘种在光合作用能力上的关键差异。我们还报告了气孔反应速度的差异，发现小麦近缘品种的气孔反应速度比优良品种的气孔反应速度快，这一特征可能有助于提高光合作用碳增益和水分利用效率。此外，这些性状似乎并不都受到[二氧化碳]升高的影响，确定潜在的遗传学对未来的育种计划至关重要。
Elevated [CO2] affects stomatal characteristics differently in wheat elite cultivars and wild accessions, resulting in faster kinetics in wild relatives, a trait useful to enhanced photosynthesis and water use. The ability of plants to respond to changes in the environment is crucial to their survival and reproductive success. The impact of increasing the atmospheric CO2 concentration (a[CO2]), mediated by behavioral and developmental responses of stomata, on crop performance remains a concern under all climate change scenarios, with potential impacts on future food security. To identify possible beneficial traits that could be exploited for future breeding, phenotypic variation in morphological traits including stomatal size and density, as well as physiological responses and, critically, the effect of growth [CO2] on these traits, was assessed in six wheat relative accessions (including Aegilops tauschii, Triticum turgidum ssp. Dicoccoides, and T. turgidum ssp. dicoccon) and five elite bread wheat T. aestivum cultivars. Exploiting a range of different species and ploidy, we identified key differences in photosynthetic capacity between elite hexaploid wheat and wheat relatives. We also report differences in the speed of stomatal responses which were found to be faster in wheat relatives than in elite cultivars, a trait that could be useful for enhanced photosynthetic carbon gain and water use efficiency. Furthermore, these traits do not all appear to be influenced by elevated [CO2], and determining the underlying genetics will be critical for future breeding programmes.
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影响因子：
3
作者：
Croxdale, JL
通讯作者：
Croxdale, JL
影响因子：
6.9
作者：
Drake PL;Froend RH;Franks PJ
通讯作者：
Franks PJ
DOI：
10.1073/pnas.2002655117
发表时间：
2020-08-11
影响因子：
11.1
作者：
Asseng, Senthold;Guarin, Jose R.;Gauthier, Paul P. G.
通讯作者：
Gauthier, Paul P. G.
影响因子：
7.4
作者：
Buckley, Thomas N.
通讯作者：
Buckley, Thomas N.
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影响因子：
6.9
作者：
Carmo-Silva, A. Elizabete;Keys, Alfred J.;Andralojc, P. John;Powers, Stephen J.;Arrabaca, M. Celeste;Parry, Martin A. J.
通讯作者：
Parry, Martin A. J.