虽然人们普遍认为气温会极大地影响光合作用过程和高等植物的生长,根区温度(RZT)对植物生长的影响,新陈代谢,基本要素,以及叶绿素和类胡萝卜素等关键代谢产物,仍然是一个需要广泛研究的领域。因此,本研究旨在探讨提高RZT对生长的影响,代谢物,元素,和红叶莴苣的蛋白质。莴苣在植物工厂中在四种不同的空气温度(17、22、27和30°C)和两种不同的RZT处理下使用人造光进行水培生长。在一组中,RZT高于空气温度3°C,虽然它不在另一组。增加RZT3°C以上的空气温度改善植物生长和代谢产物,包括类胡萝卜素,抗坏血酸,和叶绿素,在所有四个空气温度处理。此外,提高RZT增加Mg,K,Fe,Cu,Se,Rb,氨基酸,在所有四个气温下,叶片组织中的总可溶性蛋白质。这些结果表明,将RZT提高3°C可以通过在所有四个空气温度下增强养分吸收和激活根部的代谢来提高植物生产力和水培莴苣的代谢产物。总的来说,这项研究表明,植物生长和代谢产物可以同时提高RZT相对于空气温度。这项研究为未来优化与空气温度相关的RZT的研究奠定了基础。进一步推荐的研究包括调查多个RZT变化相对于空气温度的差异效应,以提高优化,检查RZT在夜间与白天的影响,并探讨了茎加热的影响。这项研究有可能为植物工厂行业的持续发展和进步以及根区生理学的基本进步做出有价值的贡献。总的来说,这项研究表明,植物生长和代谢产物可以同时提高RZT相对于空气温度。这项研究为未来优化与空气温度相关的RZT的研究奠定了基础。进一步推荐的研究包括调查多个RZT变化相对于空气温度的差异效应,以提高优化,检查RZT在夜间与白天的影响,并探讨了茎加热的影响。这项研究有可能为植物工厂行业的持续发展和进步以及根区生理学的基本进步做出有价值的贡献。
While it is commonly understood that air temperature can greatly affect the process of photosynthesis and the growth of higher plants, the impact of root zone temperature (RZT) on plant growth, metabolism, essential elements, as well as key metabolites like chlorophyll and carotenoids, remains an area that necessitates extensive research. Therefore, this study aimed to investigate the impact of raising the RZT on the growth, metabolites, elements, and proteins of red leaf lettuce. Lettuce was hydroponically grown in a plant factory with artificial light at four different air temperatures (17, 22, 27, and 30°C) and two treatments with different RZTs. The RZT was raised 3°C above the air temperature in one group, while it was not in the other group. Increasing the RZT 3°C above the air temperature improved plant growth and metabolites, including carotenoids, ascorbic acids, and chlorophyll, in all four air temperature treatments. Moreover, raising the RZT increased Mg, K, Fe, Cu, Se, Rb, amino acids, and total soluble proteins in the leaf tissue at all four air temperatures. These results showed that raising the RZT by 3°C improved plant productivity and the metabolites of the hydroponic lettuce by enhancing nutrient uptake and activating the metabolism in the roots at all four air temperatures. Overall, this research demonstrates that plant growth and metabolites can be improved simultaneously with an increased RZT relative to air temperature. This study serves as a foundation for future research on optimizing RZT in relation to air temperature. Further recommended studies include investigating the differential effects of multiple RZT variations relative to air temperature for increased optimization, examining the effects of RZT during nighttime versus daytime, and exploring the impact of stem heating. This research has the potential to make a valuable contribution to the ongoing growth and progress of the plant factory industry and fundamental advancements in root zone physiology. Overall, this research demonstrates that plant growth and metabolites can be improved simultaneously with an increased RZT relative to air temperature. This study serves as a foundation for future research on optimizing RZT in relation to air temperature. Further recommended studies include investigating the differential effects of multiple RZT variations relative to air temperature for increased optimization, examining the effects of RZT during nighttime versus daytime, and exploring the impact of stem heating. This research has the potential to make a valuable contribution to the ongoing growth and progress of the plant factory industry and fundamental advancements in root zone physiology.