Changes in Growth, Photosynthetic Pigments, Cell Viability, Lipid Peroxidation and Antioxidant Defense System in Two Varieties of Chickpea (Cicer arietinum L.) Subjected to Salinity Stress

Mushtaq, Zeenat; Faizan, Shahla; Gulzar, Basit; Mushtaq, Humira; Bushra, Sayyada; Hussain, Alisha; Hakeem, Khalid Rehman

doi:10.32604/phyton.2022.016231

Cited by 11 publications

(5 citation statements)

References 80 publications

(78 reference statements)

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“… 40 The decrease in chlorophyll content can be attributed to the increase of chlorophyll degradation under stress condition. 41 , 42 In our findings the chlorophyll content of tomato leaves was decreased under sub-optimal temperature stress and such decrease was greater in S708 than in T722. Similarly, previous study also found that there were greater decrease of chlorophyll a and b contents in low temperature sensitive common bean genotype than in tolerant one.…”

Section: Discussionsupporting

confidence: 56%

Physiological and transcriptomic analysis of tomato in response to sub-optimal temperature stress

Gao,

2024

Plant Signaling & Behavior

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Tomato ( Solanum lycopersicum L.) is one of the most important economic crops in China. However, its quality and yield are susceptible to the adverse effects of low temperatures. In our study, two tomato cultivars, showing different tolerance to low temperatures, namely the cold-sensitive tomato cultivar (S708) and cold-tolerant tomato cultivar (T722), were grown at optimal (25/18°C) and sub-optimal (15/10°C) temperature conditions for 5 days. Our study aimed to explore the effect of sub-optimal temperature on fresh weight, chlorophyll content and chlorophyll fluorescence, soluble sugars and proline content of two tomato cultivars. Moreover, we employed RNA-Seq to analyze the transcriptomic response of tomato roots to sub-optimal temperature. The results revealed that S708 showed a more significant reduction in fresh weight, chlorophyll content, photochemical efficiency of PSII (YII), maximum quantum yield of PSII (Fv/Fm), photochemical quenching (qP) and electron transport rate (ETR) compared to T722 under the sub-optimal temperature condition. Notably, T722 maintained higher level of soluble sugars and proline in comparison to S708 uner sub-optimal temperature. RNA-seq data showed that up-regulated DEGs in both tomato cultivars were involved in “plant-pathogen interaction”, “MAPK signaling pathway”, “plant hormone signal transduction”, and “phosphatidylinositol signaling system”. Furthermore, “Amino sugar and nucleotide sugar metabolism” pathway was enriched only in T722. Moreover, under sub-optimal temperature, transcription factor genes and osmoregulation genes showed varying degrees of response in both tomato cultivars. Conclusion: In summary, our results offer detailed insights into the response characteristics of tomato to sub-optimal temperature, providing valuable references for the practical management of tomato crops under sub-optimal temperature condition.

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Section: Discussionsupporting

confidence: 56%

Physiological and transcriptomic analysis of tomato in response to sub-optimal temperature stress

Gao,

2024

Plant Signaling & Behavior

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“…3A). This may be due to rise in the level of Na + , MDA, and H 2 O 2 , disrupting chloroplast membrane stability and causing degradation of the protein-pigment-lipid complex 56 . Exogenous application of melatonin reversed the downward trend and promoted plant growth, biomass, and chlorophyll contents (Fig.…”

Section: Discussionmentioning

confidence: 99%

Exogenous melatonin induces salt and drought stress tolerance in rice by promoting plant growth and defense system

Khan,

Jan,

Asif

et al. 2024

Sci Rep

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Due to global climate change, crops are certainly confronted with a lot of abiotic and biotic stress factors during their growth that cause a serious threat to their development and overall productivity. Among different abiotic stresses, salt and drought are considered the most devastating stressors with serious impact on crop’s yield stability. Here, the current study aimed to elucidate how melatonin works in regulating plant biomass, oxidative stress, antioxidant defense system, as well as the expression of genes related to salt and drought stress in rice plants. Eight groups of rice plants (3 replicates, 5 plants each) underwent varied treatments: control, melatonin, salt, drought, salt + drought, salt + melatonin, drought + melatonin, and salt + drought + melatonin. Melatonin (100 µM) was alternately applied a week before stress exposure; salt stress received 100 mM NaCl every 3 days for 3 weeks, and drought stress involved 10% PEG. Young leaves were randomly sampled from each group. The results showed that melatonin treatment markedly reduces salt and drought stress damage by promoting root, shoot length, fresh and dry weight, increasing chlorophyll contents, and inhibiting excessive production of oxidative stress markers. Salt and drought stress significantly decreased the water balance, and damaged cell membrane by reducing relative water contents and increasing electrolyte leakage. However, melatonin treated rice plants showed high relative water contents and low electrolyte leakage. Under salt and drought stress conditions, exogenous application of melatonin boosted the expression level of salt and drought stress responsive genes like OsSOS, OsNHX, OsHSF and OsDREB in rice plants. Taken together, our results reveal that melatonin treatment significantly increases salt and drought tolerance of rice plants, by increasing plant biomass, suppressing ROS accumulation, elevating antioxidants defense efficiency, and up-regulating the expression of salt and drought stress responsive genes.

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“…Further, chlorophyll and carotenoids are necessary for plant growth and development and for the synthesis of photosynthetic products. Under salt stress, chlorophyll synthesis is prevented, which will directly affect photosynthesis, slow plant growth, and reduce yield 40 , 41 . In this experiment, during NaCl stress, the chlorophyll a, chlorophyll b, carotenoids, and total chlorophyll contents of the two rice varieties were significantly decreased (Fig.…”

Section: Discussionmentioning

confidence: 99%

Exogenous Hemin alleviates NaCl stress by promoting photosynthesis and carbon metabolism in rice seedlings

Meng

Feng

Zheng

et al. 2023

Sci Rep

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It is widely known that salt stress restricts rice growth and productivity severely. However, little information is available regarding the stage of rice seedlings subjected to the Heme oxygenase 1 (HO-1) inducer, Hemin. This study aimed to investigate the effects of salt stress on two rice varieties (Huanghuazhan and Xiangliangyou 900) and the effect of Hemin in promoting photosynthesis, carbohydrate metabolism, and key enzymes under salt-stress conditions. At the stage of three leaves and one heart, Huanghuazhan (HHZ) and Xiangliangyou 900 (XLY900) were sprayed with 5 μmol·L−1 Hemin and then subjected to 50 mM NaCl stress. The results showed that NaCl stress decreased the contents of chlorophyll a, chlorophyll b, and carotenoids. Furthermore, the net photosynthetic rate (Pn) decreased remarkably and the starch content was also lowered. However, NaCl treatment enhanced the concentration of sucrose and soluble sugar, simultaneously enhancing the sucrose metabolism. Nevertheless, the foliar spraying of exogenous Hemin mediated the increase in fructose and starch content, along with the activities of key enzymes’ soluble acid invertase (SAInv), basic/neutral invertase (A/N-Inv), and sucrose synthase (SS) in rice leaves under NaCl stress. The sucrose phosphate synthase (SPS) in leaves decreased significantly, and the fructose accumulation in leaves increased. Hemin also mediated the increase of starch content and the α-amylase, total amylase, and starch phosphorylase (SP) activities under NaCl stress. Under stress conditions, the application of the Heme oxygenase 1 (HO-1) inhibitor, ZnPP failed to alleviate the damage to rice seedlings by NaCl stress. The ZnPP treatment showed similar tendency to the NaCl treatment on pigment content, gas exchange parameters and carbon metabolism related products and enzymes. However, ZnPP decreased carotenoids, fructose, starch content and enzyme activities related to starch metabolism. The regulation effect of Hemin on HuangHuaZhan was better than XiangLiangYou 900. These results indicate that Hemin improved the effects of salt stress on the photosynthesis and physiological characteristics of rice leaves as a result of enhanced carbohydrate metabolism. Thus, Hemin could alleviate the damage caused by salt stress to a certain extent.

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Changes in Growth, Photosynthetic Pigments, Cell Viability, Lipid Peroxidation and Antioxidant Defense System in Two Varieties of Chickpea (Cicer arietinum L.) Subjected to Salinity Stress

Cited by 11 publications

References 80 publications

Physiological and transcriptomic analysis of tomato in response to sub-optimal temperature stress

Physiological and transcriptomic analysis of tomato in response to sub-optimal temperature stress

Exogenous melatonin induces salt and drought stress tolerance in rice by promoting plant growth and defense system

Exogenous Hemin alleviates NaCl stress by promoting photosynthesis and carbon metabolism in rice seedlings

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