Optimum root zone temperature of photosynthesis and plant growth depends on air temperature in lettuce plants

Yamori, Namiko; Levine, Christopher P; Mattson, Neil S.; Yamori, Wataru

doi:10.1007/s11103-022-01249-w

Cited by 20 publications

(14 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chilling stress decrease the plant root growth by decreasing the biomass of the roots, and this root growth inhibition is contributed to the constrain of cell elongation and differentiation shape of root cells ( Nagasuga et al., 2011 ; Zhu et al., 2015 ; Yamori et al., 2022 ). In contrast, light regime affects the root distribution, and low light leads to longer but less branched roots in plants ( Page et al., 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Melatonin enhanced low-temperature combined with low-light tolerance of pepper (Capsicum annuum L.) seedlings by regulating root growth, antioxidant defense system, and osmotic adjustment

Xie

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

Melatonin (MT) is an important biologically active hormone that plays a vital role in plant growth and development. In particular, it has been investigated for its roles in abiotic stress management. In this study, pepper seedlings were subjected to low-temperature combined with low-light stress (LL) (15/5°C, 100 μmol m-2s-1) prior to a foliar spray of 200mM MT for 168h to investigate the protective role of MT in pepper seedlings. Our results demonstrated that LL stress negatively affected root growth, and accelerated the accumulation of reactive oxygen species (ROS), including H2O2 and O2−, changed the osmolytes contents, and antioxidative system. However, these were reversed by exogenous MT application. MT effectively promoted the root growth as indicated by significant increase in root length, surface area, root volume, tips, forks, and crossings. In addition, MT reduced the burst of ROS and MDA contents induced by LL, enhanced the activities of SOD, CAT, POD, APX, DHAR, and MDHAR resulted by upregulated expressions of CaSOD, CaPOD, CaCAT, CaAPX, CaDHAR, and CaMDHAR, and elevated the contents of AsA and GSH, declined DHA and GSSH contents, which prevented membrane lipid peroxidation and protected plants from oxidative damages under LL stress. Furthermore, seedlings treated with MT released high contents of soluble sugar and soluble protein in leave, which might enhance LL tolerance by maintaining substance biosynthesis and maintaining cellular homeostasis resulted by high levels of osmolytes and carbohydrate in the cytosol. Our current findings confirmed the mitigating potential of MT application for LL stress by promoting pepper root growth, improving antioxidative defense system, ascorbate-glutathione cycle, and osmotic adjustment.

show abstract

Section: Introductionmentioning

confidence: 99%

Melatonin enhanced low-temperature combined with low-light tolerance of pepper (Capsicum annuum L.) seedlings by regulating root growth, antioxidant defense system, and osmotic adjustment

Xie

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Specific abiotic stressors that amplify stress responses, such as root zone temperature (RZT) and light quality in plant factories, can add economic value to plants ( Dresselhaus and Hückelhoven, 2018 ). Previous studies have shown that RZT can influence various root physiological processes, such as water and nutrient uptake, photosynthesis, and assimilate distribution ( Udagawa et al., 1991 ; Klock et al., 1997 ; Yamori et al., 2022 ; Levine et al., 2023 ). Root growth increased linearly with increasing RZT from a minimum to an optimum temperature ( Arkin and Taylor, 1981 ), although further increases in RZT were accompanied by a rapid decrease in root and shoot growth ( Arkin and Taylor, 1981 ).…”

Section: Introductionmentioning

confidence: 99%

Raising root zone temperature improves plant productivity and metabolites in hydroponic lettuce production

Hayashi,

Levine,

et al. 2024

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Lettuce growth will be optimal in the air temperature range of 25°C to 28°C and humidity ranging from 60% to 78%. Unstable temperature and humidity conditions may cause the plants to wilt and interfere with the development of seedlings [3] [4]. In order for lettuce plants to germinate properly, soil humidity needs to be maintained at a value of 60% [5].…”

Section: Introductionmentioning

confidence: 99%

Soil Moisture Control System for Lettuce Seeds: Time-based Alternative Approach

Mangkusasmito,

Aldonanda,

Tadeus

2023

ULTIMA Computing

View full text Add to dashboard Cite

The utilization of lettuce leaves as a nutritious dish has made its demand relatively high. This research presents a moisture control method to optimize seed growth for lettuce. The prototype system has been developed using Arduino Mega, DF Robot soil moisture humidity sensor, and DC spraying pump for testing three different control scenarios, the open loop control system (time-based), the Proportional control system, and the combination of open loop and Proportional control method as an alternative. The results show that each control method can achieved the desired moisture of rockwool at 60%. Also, the combination of open loop and Proportional control can lessen energy usage of the system by up to 51% compared to the common open loop method.

show abstract

Optimum root zone temperature of photosynthesis and plant growth depends on air temperature in lettuce plants

Cited by 20 publications

References 61 publications

Melatonin enhanced low-temperature combined with low-light tolerance of pepper (Capsicum annuum L.) seedlings by regulating root growth, antioxidant defense system, and osmotic adjustment

Melatonin enhanced low-temperature combined with low-light tolerance of pepper (Capsicum annuum L.) seedlings by regulating root growth, antioxidant defense system, and osmotic adjustment

Raising root zone temperature improves plant productivity and metabolites in hydroponic lettuce production

Soil Moisture Control System for Lettuce Seeds: Time-based Alternative Approach

Contact Info

Product

Resources

About