Lupitu Andreea, Moisa Cristian, Bortes Flavia, Peteleu Denisa, Dochia Mihaela, Chambre Dorina, Ciutină Virgiliu, Copolovici Dana Maria, Copolovici Lucian
Institute for Research, Development and Innovation in Technical and Natural Sciences, Faculty of Food Engineering, Tourism and Environmental Protection, Aurel Vlaicu University of Arad, Elena Drăgoi Street., No. 2, 310330 Arad, Romania.
Plants (Basel). 2023 Aug 29;12(17):3098. doi: 10.3390/plants12173098.
Elevated carbon dioxide and drought are significant stressors in light of climate change. This study explores the interplay between elevated atmospheric CO, drought stress, and plant physiological responses. Two varieties (cauliflowers and cabbage) were utilized as model plants. Our findings indicate that elevated CO accelerates assimilation rate decline during drought. The integrity of photosynthetic components influenced electron transport, potentially due to drought-induced nitrate reductase activation changes. While CO positively influenced photosynthesis and water-use efficiency during drought, recovery saw decreased stomatal conductance in high-CO-grown plants. Drought-induced monoterpene emissions varied, influenced by CO concentration and species-specific responses. Drought generally increased polyphenols, with an opposing effect under elevated CO. Flavonoid concentrations fluctuated with drought and CO levels, while chlorophyll responses were complex, with high CO amplifying drought's effects on chlorophyll content. These findings contribute to a nuanced understanding of CO-drought interactions and their intricate effects on plant physiology.
鉴于气候变化，二氧化碳浓度升高和干旱是重要的胁迫因素。本研究探讨了大气中二氧化碳浓度升高、干旱胁迫与植物生理反应之间的相互作用。选用了两个品种（ cauliflower 和 cabbage ）作为模式植物。我们的研究结果表明，二氧化碳浓度升高会加速干旱期间同化率的下降。光合成分的完整性影响电子传递，这可能是由于干旱诱导的硝酸还原酶激活变化所致。虽然二氧化碳在干旱期间对光合作用和水分利用效率有积极影响，但在恢复期，高二氧化碳浓度下生长的植物气孔导度降低。干旱诱导的单萜排放因二氧化碳浓度和物种特异性反应而异。干旱通常会增加多酚含量，而在二氧化碳浓度升高的情况下则会产生相反的效果。类黄酮浓度随干旱和二氧化碳水平而波动，而叶绿素的反应则较为复杂，高二氧化碳浓度会放大干旱对叶绿素含量的影响。这些发现有助于更细致地理解二氧化碳 - 干旱相互作用及其对植物生理的复杂影响。
