Ozone tolerant maize hybrids maintain Rubisco content and activity during long-term exposure in the field.
Ozone tolerant maize hybrids maintain Rubisco content and activity during long-term exposure in the field.
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DOI：
10.1111/pce.13876
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发表时间：
2020-12
期刊：
影响因子：
--
通讯作者：
Cavanagh AP
中科院分区：
文献类型：
--
作者：
Choquette NE;Ainsworth EA;Bezodis W;Cavanagh AP
臭氧污染是一种破坏性的空气污染物，降低玉米产量相当于养分缺乏，热和干旱胁迫。因此，了解玉米对臭氧污染的生理生化反应，鉴定耐臭氧性状具有重要意义。在这项研究中，我们研究了6个玉米杂交种的生理，生化和产量的反应，以提高臭氧在现场使用自由空气臭氧富集。臭氧胁迫降低光合能力，在体内和体外，减少Rubisco含量，但不激活状态。与我们的假设相反，在玉米杂交反应臭氧的变化是不相关的气孔限制或抗氧化剂库在玉米。相反，在杂交种B73 × Mo17中，对臭氧胁迫的耐受性与叶片N含量的维持相关。与耐受线相比，敏感线显示出更大的臭氧诱导的衰老和光合能力的损失。臭氧污染显著降低了玉米产量，了解臭氧耐受性的基础反应对于开发品种以减轻损失至关重要。在田间生长的玉米中，对臭氧升高的耐受性与叶片N和Rubisco含量增加有关，保持羧化能力。
Ozone pollution is a damaging air pollutant that reduces maize yields equivalently to nutrient deficiency, heat, and aridity stress. Therefore, understanding the physiological and biochemical responses of maize to ozone pollution and identifying traits predictive of ozone tolerance is important. In this study, we examined the physiological, biochemical and yield responses of six maize hybrids to elevated ozone in the field using Free Air Ozone Enrichment. Elevated ozone stress reduced photosynthetic capacity, in vivo and in vitro, decreasing Rubisco content, but not activation state. Contrary to our hypotheses, variation in maize hybrid responses to ozone was not associated with stomatal limitation or antioxidant pools in maize. Rather, tolerance to ozone stress in the hybrid B73 × Mo17 was correlated with maintenance of leaf N content. Sensitive lines showed greater ozone‐induced senescence and loss of photosynthetic capacity compared to the tolerant line. Ozone pollution significantly reduces maize yield, and understanding the responses underpinning ozone tolerance is critical to developing varieties to mitigate losses. In field‐grown maize, tolerance to elevated ozone is associated with increased leaf N and Rubisco content, maintaining carboxylation capacity.
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影响因子：
14.8
作者：
Ainsworth, Elizabeth A.;Gillespie, Kelly M.
通讯作者：
Gillespie, Kelly M.
影响因子：
7.3
作者：
Betzelberger, Amy M.;Gillespie, Kelly M.;Ainsworth, Elizabeth A.
通讯作者：
Ainsworth, Elizabeth A.
影响因子：
6.9
作者：
Gillespie, Kelly M.;Rogers, Alistair;Ainsworth, Elizabeth A.
通讯作者：
Ainsworth, Elizabeth A.
干旱条件下三种不同 C4 草的 Rubisco 活性、特性和调节。
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.
影响因子：
7.4
作者：
DANN, MS;PELL, EJ
通讯作者：
PELL, EJ