Effects of Low-Temperature Stress and Brassinolide Application on the Photosynthesis and Leaf Structure of Tung Tree Seedlings

Zhang, Fanhang; Lü, Kun; Gu, Yu‐Cheng; Zhang, Lin; Li, Wenying; Li, Ze

doi:10.3389/fpls.2019.01767

Cited by 69 publications

(40 citation statements)

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“…The thicknesses of the spongy and palisade tissues and of the upper and lower epidermis, including the cuticle, were measured based on 20 replicates per tissue and per image. The CTR and the SR of the organizational structures were calculated as follows 30 :…”

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confidence: 99%

New perspective for evaluating the main Camellia oleifera cultivars in China

Deng

Gao

et al. 2020

Sci Rep

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To assess the adaptability of Camellia oleifera for introduction in new growth locations, this study evaluated 10 representative C. oleifera cultivars from the main areas in China where this oil-producing evergreen crop is grown. Cluster analysis, correlation analysis, and membership function analysis were used to evaluate various indices of the selected C. oleifera cultivars, including flowering phenology, cold tolerance, leaf structure, pollen characteristics, and pollen viability. The correlation analysis identified the full blossoming time, leaf palisade and spongy tissue thickness, pollen deformity rate, and pollen activity as key indices for determining the adaptability of the cultivars to new areas. The membership function analysis of the 10 C. oleifera cultivars revealed the following order of adaptability: ‘XLC25’ > ‘Changlin4hao’ > ‘Ganzhouyou8hao’ > ‘Ganzhouyou6hao’ > ‘Tiechengyihao’ > ‘Eyou465’ > ‘XLC10’ > ‘Changlin3hao’ > ‘Changlin18hao’ > ‘QY235.’ When introducing C. oleifera cultivars to new regions, the higher-ranked cultivars are more likely to be successful. The results of this study may provide a new direction for the comprehensive assessment of plant introduction and domestication potential, i.e., the assessment of the vegetative and reproductive growth, adversity resistance, and blossoming time of plants.

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confidence: 99%

New perspective for evaluating the main Camellia oleifera cultivars in China

Deng

Gao

et al. 2020

Sci Rep

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“…The fact that BR accumulates in the chloroplasts (probably also in the membranes) of both the 522DK mutant and its wild type suggests that these hormones could be very important for the appropriate functioning of the chloroplasts. The phenomenon of the incorporation of BR in the chloroplast structure will require further research, even though some guidance regarding the role of BR was provided by Cai et al [ 48 ], Zhang et al [ 49 ] and Krumova et al [ 50 ]. Exogenous BR prevented injuries to the chloroplast ultrastructure in plants that had been exposed to high and low temperatures [ 48 , 49 ].…”

Section: Resultsmentioning

confidence: 99%

Molecular Dynamics of Chloroplast Membranes Isolated from Wild-Type Barley and a Brassinosteroid-Deficient Mutant Acclimated to Low and High Temperatures

et al. 2020

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Plants have developed various acclimation strategies in order to counteract the negative effects of abiotic stresses (including temperature stress), and biological membranes are important elements in these strategies. Brassinosteroids (BR) are plant steroid hormones that regulate plant growth and development and modulate their reaction against many environmental stresses including temperature stress, but their role in modifying the properties of the biological membrane is poorly known. In this paper, we characterise the molecular dynamics of chloroplast membranes that had been isolated from wild-type and a BR-deficient barley mutant that had been acclimated to low and high temperatures in order to enrich the knowledge about the role of BR as regulators of the dynamics of the photosynthetic membranes. The molecular dynamics of the membranes was investigated using electron paramagnetic resonance (EPR) spectroscopy in both a hydrophilic and hydrophobic area of the membranes. The content of BR was determined, and other important membrane components that affect their molecular dynamics such as chlorophylls, carotenoids and fatty acids in these membranes were also determined. The chloroplast membranes of the BR-mutant had a higher degree of rigidification than the membranes of the wild type. In the hydrophilic area, the most visible differences were observed in plants that had been grown at 20 °C, whereas in the hydrophobic core, they were visible at both 20 and 5 °C. There were no differences in the molecular dynamics of the studied membranes in the chloroplast membranes that had been isolated from plants that had been grown at 27 °C. The role of BR in regulating the molecular dynamics of the photosynthetic membranes will be discussed against the background of an analysis of the photosynthetic pigments and fatty acid composition in the chloroplasts.

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“…Most abiotic stress sources can stimulate ROS production, which may lead to oxidative damage, inhibit the metabolic process of photosynthesis, and have adverse effects on crop yield and quality [36][37][38]. In addition to the recognized classical antioxidant mechanisms, sugar and carbohydrate metabolic enzymes play an important role in antioxidant stress.…”

Section: Discussionmentioning

confidence: 99%

Exogenous application of melatonin may contribute to enhancement of soybean drought tolerance via its effects on glucose metabolism

Cao

Qin

Zhang

2021

Biotechnology & Biotechnological Equipment

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Sugar metabolism is among the most important metabolic processes in soybean; it not only affects growth and development, but also plays a role in drought resistance. As a plant biological regulator, exogenous melatonin is assumed to regulate sugar metabolism. Here, physiological and transcriptomic approaches were used to determine the effects of melatonin on physiological indices and key genes and pathways associated with soybean sugar metabolism under drought stress. In plants subjected to drought stress, melatonin treatment increased dry matter accumulation, reduced malondialdehyde content, and increased the content of metabolized sugars in leaves, thereby enhancing soybean yield. Transcriptome analysis revealed that the genes differentially expressed in plants subjected to melatonin treatment and drought stress were enriched in the KEGG "sucrose and starch metabolism" pathway related to glucose metabolism. Among the differentially expressed genes, we identified 12 significantly altered genes associated with glucose metabolism that played roles in regulating the activities of glucose metabolism-related enzymes. Collectively, our results indicated that melatonin can enhance the output of glucose metabolites and tolerance of soybean subjected to drought stress by regulating the genes associated with glucose metabolism and activation of the related enzymes. Our findings provide a detailed theoretical basis for analyzing the regulatory effects of melatonin on soybean sugar metabolism under conditions of drought stress.

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Effects of Low-Temperature Stress and Brassinolide Application on the Photosynthesis and Leaf Structure of Tung Tree Seedlings

Abstract: the damage caused by cold injury. The results also showed that V. fordii seedlings are more resistant to low temperatures than V. montana seedlings.

Cited by 69 publications

References 67 publications

New perspective for evaluating the main Camellia oleifera cultivars in China

New perspective for evaluating the main Camellia oleifera cultivars in China

Molecular Dynamics of Chloroplast Membranes Isolated from Wild-Type Barley and a Brassinosteroid-Deficient Mutant Acclimated to Low and High Temperatures

Exogenous application of melatonin may contribute to enhancement of soybean drought tolerance via its effects on glucose metabolism

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