Elevated CO 2 alters photosynthesis, growth and susceptibility to powdery mildew of oak seedlings
Elevated CO 2 alters photosynthesis, growth and susceptibility to powdery mildew of oak seedlings
复制标题
CO 2 升高会改变橡树幼苗的光合作用、生长和对白粉病的易感性
DOI：
10.1101/2023.01.07.523094
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Sanchez-Lucas R
中科院分区：
文献类型：
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作者：
Sanchez-Lucas R
CO2浓度升高（eCO 2）是气候变化的决定性因素，也是影响植物生理、生长和抗病能力的重要因素。PM存在于大多数栎林中，被认为是栎林更新的瓶颈。本研究旨在揭示eCO 2对植物对PM响应的影响。在大气CO2浓度（aCO_2 = 400 ppm）和eCO_2浓度（eCO_2 = 1000 ppm）的控制环境中，用栎类PM的病原菌白粉菌（Erysiphe acetitoides）侵染栎类幼苗。 监测植物生长、生理参数和疾病进展。此外，为了评价eCO 2对诱导抗性（IR）的影响，用IR诱导剂β-氨基丁酸（BABA）处理后测定了这些参数。我们的研究结果表明，二氧化碳增加了光合速率和气生生长，但相反，减少了根长。重要的是，eCO 2下的幼苗更容易受到PM。用BABA处理保护幼苗免受PM的侵害，并且这种保护在eCO 2下保持。此外，无论CO2的浓度，BABA没有显着改变气生生长，但导致更长的根系，从而减轻eCO 2在根缩短的影响。我们的研究结果表明eCO 2在植物生理，生长和防御的影响，并保证进一步的生物分子研究，以解开的机制，eCO 2增加橡树幼苗对PM的敏感性。
Elevated CO2(eCO2) is a determinant factor of climate change and is known to alter plant processes such as physiology, growth and resistance to pathogens.Quercus robur, a tree species integrated in most forest regeneration strategies, shows high vulnerability to powdery mildew (PM) disease at the seedling stage. PM is present in most oak forests and it is considered a bottleneck for oak woodland regeneration. Our study aims to decipher the effect of eCO2on plant responses to PM. Oak seedlings were grown in controlled environment at ambient (aCO2, ∼400 ppm) and eCO2(∼1000 ppm), and infected withErysiphe alphitoides,the causal agent of oak PM. Plant growth, physiological parameters and disease progression were monitored. In addition, to evaluate the effect of eCO2on induced resistance (IR), these parameters were assessed after treatments with IR elicitor β-aminobutyric acid (BABA). Our results show that eCO2increases photosynthetic rates and aerial growth but in contrast, reduces root length. Importantly, under eCO2seedlings were more susceptible to PM. Treatments with BABA protected seedlings against PM and this protection was maintained under eCO2. Moreover, irrespectively of the concentration of CO2, BABA did not significantly change aerial growth but resulted in longer radicular systems, thus mitigating the effect of eCO2in root shortening. Our results demonstrate the impact of eCO2in plant physiology, growth and defence, and warrant further biomolecular studies to unravel the mechanisms by which eCO2increases oak seedling susceptibility to PM.