Improving Plant Growth and Alleviating Photosynthetic Inhibition and Oxidative Stress From Low-Light Stress With Exogenous GR24 in Tomato (Solanum lycopersicum L.) Seedlings

Lu, Tao; Yu, Hongjun; Li, Qiang; Chai, Lan‐Qin; Jiang, Weijie

doi:10.3389/fpls.2019.00490

Cited by 101 publications

(66 citation statements)

References 64 publications

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“…Overall, many studies have reported on the influence of low light or low temperature alone on plant seedlings (Ogweno et al 2009, Sui et al 2012, Zhu et al 2017, Megha et al 2018, Lu et al 2019, but only a few focused on the effects of LL, which is similar to the environment in greenhouses during winter-spring days. In particular, the Car composition in plants, especially in pepper leaves, under L and LL has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Changes in photosynthesis and carotenoid composition of pepper (Capsicum annuum L.) in response to low-light stress and low temperature combined with low-light stress

Zhang¹,

Li²,

Xie³

et al. 2020

Photosynt.

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Light and temperature are two major factors for plant growth. Carotenoids are important photoprotective and lightharvesting pigments in photosynthetic organs. Therefore, this study explored photosynthesis and carotenoid-related metabolism under control (CK), low-light (L), and low-temperature and low-light (LL) conditions by using the pepper (Capsicum annuum L.) varieties Longjiao 5 and Hangjiao 4. We found the increased inhibition of plant growth and photosynthetic capacity under both L and LL stress. Meanwhile, carotenoid-related metabolic compounds accumulated in pepper showed different responses to the two stresses. Significantly, zeaxanthin contents were 6.69-8.88 times higher under LL than that of CK, α-carotene contents were 0.9-2.1 times higher under L than that of CK, which may enhance the tolerance to LL and L. Our findings provide a foundation for further research on the molecular mechanism of carotenoid functions regarding L and LL tolerance by regulating photosynthesis.

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Section: Introductionmentioning

confidence: 99%

Changes in photosynthesis and carotenoid composition of pepper (Capsicum annuum L.) in response to low-light stress and low temperature combined with low-light stress

Zhang¹,

Li²,

Xie³

et al. 2020

Photosynt.

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“…Chloroplasts are the main site for photosynthetic reactions and are also sensitive to HT stress (Tang et al 2006, Marečková et al 2019. The Chl content often reflects the chloroplast development and photosynthetic performance (Lu et al 2019). In our study, HT stress significantly reduced the contents of Chl a and Chl b, probably because the high temperature severely damaged the structure and function of Chl, or significantly increased the activity of Chl-degrading enzymes.…”

Section: Discussionmentioning

confidence: 47%

“…Absorbance values were measured at 645 and 663 nm by using the ultraviolet spectrophotometer (Cary 50 Conc UV-VIS, Varian, Victoria, Australia). The concentrations of Chl a and Chl b were determined according to the following formulas (Lu et al 2019…”

Section: Photosynthetic Pigment Contentmentioning

confidence: 99%

“…ROS are highly active and reactive, and they can destroy normal metabolism by oxidative damage to proteins, nucleic acids, and lipids without any protective mechanism (Almeselmani et al 2006). Lipid peroxidation is usually used to detect ROS damage, which clearly reflects the damage of cell membranes caused by abiotic stress (Lu et al 2019). Under stress conditions, the antioxidant defense system of plants is activated to protect cells from the negative effects of ROS (Noctor and Foyer 1998).…”

Section: Treatmentmentioning

confidence: 99%

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High humidity alleviates photosynthetic inhibition and oxidative damage of tomato seedlings under heat stress

Xu¹,

Yang²,

Yang³

et al. 2020

Photosynt.

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This study investigated the effects of high humidity on the growth and photosynthetic and physiology traits of tomato plants under high temperature stress (HT). The results showed that high humidity effectively alleviated the limitation of HT on plant growth and increased the root-to-shoot ratio. In addition, high humidity also increased the chlorophyll content, net photosynthetic rate, and maximum photochemical quantum yield of PSII in tomato seedlings under HT stress, but declined the stomatal limitation value. Moreover, JIP-test showed that increasing air humidity improved the quantum yields and efficiencies of HT-stressed tomato plants and increased the size of functional antenna, while reduced the activity of a portion of reaction centers. Besides, high humidity increased the activity of antioxidant enzymes, but decreased the content of malondialdehyde and hydrogen peroxide in HT-stressed tomato plants. Therefore, high humidity improved the growth and alleviated photoinhibition and oxidative stress of tomato seedlings under heat stress.

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“…Superoxide dismutase (SOD), Peroxidase (POD) and Catalase (CAT) activities were performed following the method of [59].…”

Section: Antioxidant Enzyme Assaysmentioning

confidence: 99%

Mitigation of Heat Stress in Solanum lycopersicum L. by ACC-deaminase and Exopolysaccharide Producing Bacillus cereus: Effects on Biochemical Profiling

et al. 2020

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Soil microorganisms might be assessed for their capabilities of plant growth promotion in order to identify heat tolerant strategies for crop production. The planned study was conducted to determine the potential of heat tolerant plant growth promoting rhizobacteria (PGPR) in mitigating heat stress effects in tomato. Bacillus cereus was evaluated for plant growth promoting activities and assessed for 1-aminocyclopropane-1-carboxylate (ACC-deaminase) (0.76–C0.9 μM/mg protein/h), and exopolysaccharide (0.66–C0.91 mg/mL) under normal and heat stressed conditions. Plant growth regulators were evaluated through High Performance Liquid Chromatography. Bacterial inoculation effects on important physiological and biochemical parameters were evaluated under normal and heat stressed conditions in growth chamber. The morphological-physiological traits significantly revealed drastic effects on both of un-inoculated tomato varieties under heat stress conditions. Bacterial augmentation significantly promoted shoot, root length, leaf surface area, fresh and dry weight. Heat stress enhanced extracellular polymeric substances (EPS) production and cleavage of ACC into a-ketobutyrate and ammonia due to ACC-deaminase producing bacteria that significantly reduced the adverse effects of heat on tomato growth. In conclusion, the applied plant growth promoting rhizobacteria (PGPR) bacterial strain proved as potential candidate for improving tomato crop growing under heat stressed conditions. However, it is highly suggested to validate the current results by conducting field trials.

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Improving Plant Growth and Alleviating Photosynthetic Inhibition and Oxidative Stress From Low-Light Stress With Exogenous GR24 in Tomato (Solanum lycopersicum L.) Seedlings

Cited by 101 publications

References 64 publications

Changes in photosynthesis and carotenoid composition of pepper (Capsicum annuum L.) in response to low-light stress and low temperature combined with low-light stress

Changes in photosynthesis and carotenoid composition of pepper (Capsicum annuum L.) in response to low-light stress and low temperature combined with low-light stress

High humidity alleviates photosynthetic inhibition and oxidative damage of tomato seedlings under heat stress

Mitigation of Heat Stress in Solanum lycopersicum L. by ACC-deaminase and Exopolysaccharide Producing Bacillus cereus: Effects on Biochemical Profiling

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