Biochemical and molecular changes induced by salinity stress in Oryza sativa L.

Khan, Mohd Shahanbaj; Hemalatha, S.

doi:10.1007/s11738-016-2185-8

Cited by 20 publications

(10 citation statements)

References 56 publications

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“…Salinity affects major physiological processes such as germination, relative growth rate, transpiration, photosynthesis, senescence, loss of cell membrane stability, chlorophyll degradation and ultimate senescence in plant (Khan & Hemalatha, ; Ra, He, & Mk, ). The overexpression study of PsLecRLK in tobacco (Vaid et al, ), showed the maintenance of chlorophyll and cell membrane stability as compared to WT tobacco under salinity stress.…”

Section: Discussionmentioning

confidence: 99%

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Rice lectin receptor‐like kinase provides salinity tolerance by ion homeostasis

Passricha

Saifi

Kharb

et al. 2019

Biotech & Bioengineering

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Sensing stress and activating the downstream signaling pathways is the imperative step for stress response. Lectin receptor‐like kinase (LecRLK) is an important family that plays a key role in sensing stress conditions through lectin receptor and activates downstream signaling by kinase domain. We identified the role of OsLecRLK gene for salinity stress tolerance and hypothesized its role in Na+ extrusion from cell. OsLecRLK overexpression and downregulation (through artificial miRNA) transgenic lines were developed and its comparison with wild‐type (WT) plants were performed overexpression transgenic lines showed better performance, whereas downregulation showed poor performance than WT. Lower accumulation of reactive oxygen species (ROS), malondialdehyde and toxic ion, and a higher level of proline, RWC, ROS scavengers in overexpression lines lead us to the above conclusion. Based on the relative expression of stress‐responsive genes, ionic content and interactome protein, working model highlights the role of OsLecRLK in the extrusion of Na+ ion from the cell. This extrusion is facilitated by a higher expression of salt overly sensitive 1 (Na+/K+ channel) in overexpression transgenic line. Altered expression of stress‐responsive genes and changed biochemical and physiological properties of cell suggests an extensive reprogramming of the stress‐responsive metabolic pathways by OsLecRLK under stress condition, which could be responsible for the salt tolerance capability.

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Section: Discussionmentioning

confidence: 99%

“…This study also focused on elucidating the working mechanism of OsLecRLK in providing salinity stress tolerance in rice. | 505 loss of cell membrane stability, chlorophyll degradation and ultimate senescence in plant (Khan & Hemalatha, 2016;Ra, He, & Mk, 2016).…”

Section: Discussionmentioning

confidence: 99%

Rice lectin receptor‐like kinase provides salinity tolerance by ion homeostasis

Passricha

Saifi

Kharb

et al. 2019

Biotech & Bioengineering

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“…Kaya et al (2013) and Peng et al (2017) declared soil salinity as a global problem. As described by Khan and Hemalatha (2016) and photosystems get impaired, production of reactive oxygen species is accelerated, and growth is reduced due to excessive NaCl concentration. Firstly, cellular organelles are damaged due to high concentrations of Na + , thus causing changes in of enzymatic activities, protein synthesis, respiration, and photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Exogenous melatonin enhances salt stress tolerance in tomato seedlings

Altaf¹,

Shahid²,

Ren³

et al. 2020

Biologia plant.

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Melatonin (N-acetyl-5-methoxytryptamine) is an essential molecule which regulates plant growth and development and alleviates the damaging effects of abiotic stresses. To evaluate the important functions of melatonin in response to salinity stress, the effects of exogenous melatonin on the antioxidant system and growth of tomato (Solanum lycopersicum L.) under 150 mM NaCl stress were investigated. The application of 100 μM melatonin compensated the growth inhibition caused by salt-stress. Melatonin treated seedlings had an increased fresh and dry masses of shoots and roots. The application of 1-200 µM melatonin notably enhanced the relative chlorophyll content (SPAD index), root characteristics, and gas exchange in tomato seedlings subjected to salt stress compared to seedlings treated with salt stress alone. Moreover, melatonin pretreatment minimized accumulation of reactive oxygen species and improved activities of antioxidative enzymes including catalase, superoxide dismutase, glutathione reductase, and ascorbate peroxidase.

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“…The most commonly studied defense compounds that act as first line of defense are mitogen activated protien kinases (MAPKs), peroxidase (POD), and phenylalanine ammonia lyase (PAL) (Eliahu et al, 2007). Together with the introduction and buildup of other pathogenesis-related (PR) proteins, like β-1,3-Glucanase (Kessmann et al, 1994) Catalase, Superoxide dismutases (Khan and Hemalatha, 2016), and PolyPhenol Oxidase (Canxing et al, 2013), these compounds contribute to systemic acquired resistance (SAR) by accumulating profusely at the site of infection. Most of these compounds accumulated in resistant rice genotypes under field conditions.…”

Section: Introductionmentioning

confidence: 99%

Biochemical Profiling of Resistant Phenotypes Against Bipolaris oryzae Causing Brown Spot Disease in Rice

et al. 2021

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Brown leaf spot disease of rice is a dominant lethal disease, caused by the fungus Bipolaris oryzae. The pathogen is an obligate parasite and causes qualitative and quantitative damage to rice crop. The objective of the present study was to investigate what extent the defense related biochemical compounds reflect the distinct categories of resistance phenotypes in rice against brown spot disease. This was done by determining the concentration of Catalase (CAT), Phenylalanine ammonia-lyase (PAL), Polyphenol oxidase (PPO), Peroxidase (POD), and β-1,3-Glucanase enzymes in resistant, moderately resistant and susceptible rice genotypes. The disease resistant phenotypes in rice line (PARC-7) reflect the higher accumulation of CAT, PAL, PPO, POD, and β-1,3-Glucanase. The pattern of enzyme accumulation was similar in all resistant genotypes. The rice genotypes with moderately resistant phenotypes showed significant difference with respect to the concentration of biochemical defense-related compounds. The difference in accumulation of defense related enzymes reflected the level of disease severity (% leaf area covered) on resistant and moderately resistant genotypes. The susceptible rice genotypes showed the minimum concentration of these enzymes, with the lowest concentrations found in the rice variety Bas-2000 (80% Disease Index). The differential defense response in resistant and susceptible genotypes suggests that these enzymes can be used as biochemical markers for early detection of disease resistant genotypes. The study of enzyme accumulation at different time points and at different levels of disease severity helps to understand the resistance mechanisms against brown spot disease in rice.

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Biochemical and molecular changes induced by salinity stress in Oryza sativa L.

Cited by 20 publications

References 56 publications

Rice lectin receptor‐like kinase provides salinity tolerance by ion homeostasis

Rice lectin receptor‐like kinase provides salinity tolerance by ion homeostasis

Exogenous melatonin enhances salt stress tolerance in tomato seedlings

Biochemical Profiling of Resistant Phenotypes Against Bipolaris oryzae Causing Brown Spot Disease in Rice

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