Effect of low temperature and high humidity stress on physiology of cucumber at different leaf stages

Amin, Bakht; Atif, Muhammad; Wang, Xiao; Meng, Huanwen; Ghani, Muhammad Imran; Ali, Muhammad; Ding, Yuanyuan; Li, Xiuju; Cheng, Zhihui

doi:10.1111/plb.13276

Cited by 25 publications

(23 citation statements)

References 72 publications

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“…•− . Similar results were also found in lily [42] and cucumber [43]; as such, P. ostii can remove ROS produced under high-temperature stress by inducing the activity of antioxidant enzymes and reducing damage to the structure of the cell membrane, thus becoming better adapted to the external environment. However, studies on lettuce [44] showed that the peroxidase activity decreased with the development of high-temperature stress to varying degrees.…”

Section: Discussionsupporting

confidence: 78%

Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii

Wang¹,

Fang²,

Zhao³

et al. 2022

Phyton

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Paeonia ostii is an economically important oil crop, which has been widely cultivated in the middle and lower reaches of the Yangtze River in China in recent years. Although P. ostii is highly adaptable to the environment, the prolonged high summer temperature in this region severely inhibits its growth, which adversely affects seed yield and quality. In this study, P. ostii plants were subjected to 20°C/15°C (day/night) and 40°C/35°C (day/night) temperatures for 15 days. The changes in physiological and biochemical indicators of P. ostii under high-temperature stress were initially investigated. The results showed that with the deepening of leaf etiolation, chlorophyll a and chlorophyll b concentration, carotenoid concentration, Soil Plant Analysis Development (SPAD) values and leaf relative water content decreased significantly, while both relative electrical conductivity (REC) and free proline concentration showed an upward trend. Meanwhile, the continuous accumulation of reactive oxygen species (ROS) in P. ostii plants, led to an increased activity of antioxidant enzymes including superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX). Moreover, with the extension of the high-temperature treatment, the anatomical structures of P. ostii were destroyed, resulting in a decreased photochemical efficiency of the photosystem II (PSII) reaction center and photosynthesis was inhibited. Taken together, these results provide reference values for understanding the physiological response of P. ostii to hightemperature stress and establish a foundation for further research on the relevant underlying molecular mechanisms.

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Section: Discussionsupporting

confidence: 78%

Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii

Wang¹,

Fang²,

Zhao³

et al. 2022

Phyton

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“…In this study, we show that MT application improves cucumber seedling growth under LT and HH stress by regulating seedling morphology and improving photosynthesis, antioxidant enzyme defense, and nutrient uptake. Consistent with our recent report ( Amin et al, 2021 ), LT and HH obstructed cucumber seedling growth by negatively affecting the plant morphological traits and biomass accumulation, and foliar application of MT effectively alleviated these inhibitory effects of LTHH stress. These results are also in agreement with the study of Li et al (2017) , which showed that the growth and biomass of plants reflect their sensitivity or resistance to abiotic stresses.…”

Section: Discussionsupporting

confidence: 92%

“…The reduction in morphological traits might be related to photosynthesis and the antioxidant defense system. LT and HH affect photosynthesis by impacting carbon (C) fixation and electron transport in thylakoids ( Amin et al, 2021 ). LT and HH damage photosynthesis by affecting energy production.…”

Section: Discussionmentioning

confidence: 99%

“…Ninety-five percent of the dry matter content of plants is derived from photosynthesis and forms the basis of crop yield ( Zhang et al, 2021 ). The decline in photosynthetic efficiency is the main reason for the reduction in plant biomass under LT and HH conditions ( Amin et al, 2021 ). Photosynthesis is a complex process that involves numerous biological pathways.…”

Section: Discussionmentioning

confidence: 99%

“…To conduct antioxidant enzyme activity assays, samples were prepared as described previously ( Amin et al, 2021 ). To measure the SOD (EC 1.15.1.1) activity, nitro blue tetrazolium (NBT) was added to the enzyme extract and exposed to fluorescent light for 20 min, after 20 min, the absorbance of the reaction mixture was measured using a spectrophotometer at 560 nm ( Stewart and Bewley, 1980 ).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Melatonin Rescues Photosynthesis and Triggers Antioxidant Defense Response in Cucumis sativus Plants Challenged by Low Temperature and High Humidity

et al. 2022

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Environmental factors such as low temperature (LT) and high humidity (HH) hinder plant growth and development in plastic tunnels and solar greenhouses in the cold season. In this study, we examined the effect of melatonin (MT) on shoot-based tolerance to LT and HH conditions in cucumber (Cucumis sativus) seedlings and explored its underlying mechanism. LT and HH stress inhibited growth and biomass accumulation, produced leaf chlorosis, led to oxidative stress, lowered chlorophyll and carotenoid contents, reduced photosynthetic and photosystem II (PSII) activities, and increased the level of intercellular carbon dioxide and the non-photochemical quenching of photosystem I (PSI) and PSII. However, foliar application of MT significantly improved the morphological indices and photosynthetic efficiency of cucumber seedlings, which entailed the elevation of electrolyte leakage, lipid peroxidation, and reactive oxygen species accumulation by boosting the antioxidant enzyme defense system under LT and HH conditions. Additionally, the measurement of nitrogen (N), magnesium (Mg), and iron (Fe) contents in roots and leaves showed that MT significantly augmented the nutrient uptake of cucumber seedlings exposed to LT and HH stresses. Furthermore, MT application increased the transcripts levels of genes encoding antioxidant enzymes under LT and HH conditions, whereas treatment with LT and HH suppressed these genes, suggesting that MT application increases the LT and HH tolerance of cucumber seedlings. Overall, our results suggest that MT application increases the tolerance of cucumber seedlings to LT and HH stress by enhancing the plant morphometric parameters, regulating PSI and PSII, and activating the antioxidant defense mechanism. Thus, the exogenous application of MT could be potentially employed as a strategy to improve the LT and HH tolerance of cucumber.

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Exogenous Salicylic Acid Improves Photosynthetic and Antioxidant Capacities and Alleviates Adverse Effects of Cherry Rootstocks Under Salt Stress

Xu,

Wang

et al. 2024

J Plant Growth Regul

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Effect of low temperature and high humidity stress on physiology of cucumber at different leaf stages

Cited by 25 publications

References 72 publications

Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii

Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii

Melatonin Rescues Photosynthesis and Triggers Antioxidant Defense Response in Cucumis sativus Plants Challenged by Low Temperature and High Humidity

Exogenous Salicylic Acid Improves Photosynthetic and Antioxidant Capacities and Alleviates Adverse Effects of Cherry Rootstocks Under Salt Stress

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