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首页> 美国卫生研究院文献>Plants >Yield Physiological Performance and Phytochemistry of Basil (Ocimum basilicum L.) under Temperature Stress and Elevated CO2 Concentrations
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Yield Physiological Performance and Phytochemistry of Basil (Ocimum basilicum L.) under Temperature Stress and Elevated CO2 Concentrations

机译：温度胁迫下罗勒（OCimum Basilicum L.）的产量生理性能和植物化学和CO 2浓度升高

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摘要

Early season sowing is one of the methods for avoiding yield loss for basil due to high temperatures. However, basil could be exposed to sub-optimal temperatures by planting it earlier in the season. Thus, an experiment was conducted that examines how temperature changes and carbon dioxide (CO2) levels affect basil growth, development, and phytonutrient concentrations in a controlled environment. The experiment simulated temperature stress, low (20/12 °C), and high (38/30 °C), under ambient (420 ppm) and elevated (720 ppm) CO2 concentrations. Low-temperature stress prompted the rapid closure of stomata resulting in a 21% decline in net photosynthesis. Chlorophylls and carotenoids decreased when elevated CO2 interacted with low-temperature stress. Basil exhibited an increase in stomatal conductance, intercellular CO2 concentration, apparent quantum yield, maximum photosystem II efficiency, and maximum net photosynthesis rate when subjected to high-temperature stress. Under elevated CO2, increasing the growth temperature from 30/22 °C to 38/30 °C markedly increased the antioxidants content of basil. Taken together, the evidence from this research recommends that varying the growth temperature of basil plants can significantly affect the growth and development rates compared to increasing the CO2 concentrations, which mitigates the adverse effects of temperature stress.
机译：早期播种是由于高温避免罗勒损失的方法之一。然而，罗勒可以通过在本赛季早期种植来暴露于次优温度。因此，进行了实验，该实验检查温度变化和二氧化碳（二氧化碳）水平如何影响受控环境中罗勒生长，发育和植物营养素浓度。实验模拟温度应力，低（20/12°C）和高（38/30°C），在环境（420ppm）下，升高（720ppm）CO 2浓度。低温应力促使气孔快速闭合，导致净光合作用的21％下降。当升高的CO2与低温胁迫相互作用时，叶绿素和类胡萝卜素减少。罗勒在经受高温胁迫时表现出气孔导率，细胞间CO 2浓度，表观量子产量，最大光系统II效率和最大净光合速率的增加。在二氧化碳升高，将增长温度从30/22℃增加至38/30℃，显着增加了罗勒的抗氧化剂含量。与此研究的证据共同建议改变罗勒植物的生长温度与增加CO 2浓度相比，可以显着影响生长和发展率，这减轻了温度胁迫的不良影响。

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