Effect of UV-B priming on the abiotic stress tolerance of stress-sensitive rice seedlings: Priming imprints and cross-tolerance

UV-B radiation is a major abiotic stress factor that adversely affects the growth and productivity of crop plants including rice (Oryza sativa L.). However, on the other hand, lower doses of UV-B radiation applied to seeds can have a priming effect on plants emerging from it. In this study, seeds of O. sativa var. kanchana were primed with UV-B radiation (6 kJ m–2) and were further subjected to NaCl, polyethylene glycol 6000 (PEG) and UV-B stress. The effects of UV-B priming in imparting NaCl, PEG and UV-B stress tolerance to rice seedlings were analysed through various photosynthetic features and antioxidative mechanisms. PSI and PSII activity levels as well as chl a fluorescence were found to be significantly higher in the UV-B primed and unstressed seedlings. When stress (NaCl, PEG and high UV-B) was imposed, increased PSI and PSII activity levels, chl a fluorescence and metabolite accumulation (proline, total phenolics and sugar) as well as nonenzymatic (ascorbate and glutathione) and enzymatic (superoxide dismutase, catalase, ascorbate peroxidase) antioxidants were recorded in UV-B primed and NaCl-stressed plants followed by UV-B primed and UV-B–stressed plants, and primed and PEG-stressed, compared with unprimed and stressed conditions. The results indicate that UV-B priming in rice seedlings effectively enhances the NaCl stress tolerance potential in rice to a greater extent than UV-B and PEG stress tolerance potential. The cost-effectiveness of UV-B seed priming is predominantly clear from the differing tolerance responses of rice seedlings exposed to different stress conditions.

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Calcium-Dependent Protein Kinases (CDPK) in Abiotic Stress Tolerance

THE JOURNAL OF PLANT SCIENCE RESEARCH ◽

10.32381/jpsr.2018.34.02.15 ◽

2018 ◽

Vol 34 (2) ◽

pp. 259-265 ◽

Cited By ~ 2

Author(s):

Hemant B Kardile ◽

◽

Vikrant ◽

Nirmal Kant Sharma ◽

Ankita Sharma ◽

...

Keyword(s):

Abiotic Stress ◽

Stress Tolerance ◽

Protein Kinases ◽

Abiotic Stress Tolerance ◽

Calcium Dependent ◽

Dependent Protein ◽

Calcium Dependent Protein Kinases

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Roles of Nitric Oxide in Conferring Multiple Abiotic Stress Tolerance in Plants and Crosstalk with Other Plant Growth Regulators

Journal of Plant Growth Regulation ◽

10.1007/s00344-021-10446-8 ◽

2021 ◽

Author(s):

Rajesh Kumar Singhal ◽

Hanuman Singh Jatav ◽

Tariq Aftab ◽

Saurabh Pandey ◽

Udit Nandan Mishra ◽

...

Keyword(s):

Nitric Oxide ◽

Abiotic Stress ◽

Plant Growth ◽

Stress Tolerance ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Abiotic Stress Tolerance

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Genome-Wide Identification and Expression Profiling of the PDI Gene Family Reveals Their Probable Involvement in Abiotic Stress Tolerance in Tomato (Solanum lycopersicum L.)

Genes ◽

10.3390/genes12010023 ◽

2020 ◽

Vol 12 (1) ◽

pp. 23

Author(s):

Antt Htet Wai ◽

Muhammad Waseem ◽

A B M Mahbub Morshed Khan ◽

Ujjal Kumar Nath ◽

Do Jin Lee ◽

...

Keyword(s):

Abiotic Stress ◽

Gene Family ◽

Stress Tolerance ◽

Solanum Lycopersicum ◽

Expression Profiling ◽

Abiotic Stress Tolerance ◽

Dependent Manner ◽

Solanum Lycopersicum L ◽

Genome Wide ◽

Protein Disulfide

Protein disulfide isomerases (PDI) and PDI-like proteins catalyze the formation and isomerization of protein disulfide bonds in the endoplasmic reticulum and prevent the buildup of misfolded proteins under abiotic stress conditions. In the present study, we conducted the first comprehensive genome-wide exploration of the PDI gene family in tomato (Solanum lycopersicum L.). We identified 19 tomato PDI genes that were unevenly distributed on 8 of the 12 tomato chromosomes, with segmental duplications detected for 3 paralogous gene pairs. Expression profiling of the PDI genes revealed that most of them were differentially expressed across different organs and developmental stages of the fruit. Furthermore, most of the PDI genes were highly induced by heat, salt, and abscisic acid (ABA) treatments, while relatively few of the genes were induced by cold and nutrient and water deficit (NWD) stresses. The predominant expression of SlPDI1-1, SlPDI1-3, SlPDI1-4, SlPDI2-1, SlPDI4-1, and SlPDI5-1 in response to abiotic stress and ABA treatment suggested they play regulatory roles in abiotic stress tolerance in tomato in an ABA-dependent manner. Our results provide new insight into the structure and function of PDI genes and will be helpful for the selection of candidate genes involved in fruit development and abiotic stress tolerance in tomato.

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Citric Acid-Mediated Abiotic Stress Tolerance in Plants

International Journal of Molecular Sciences ◽

10.3390/ijms22137235 ◽

2021 ◽

Vol 22 (13) ◽

pp. 7235

Author(s):

Md. Tahjib-Ul-Arif ◽

Mst. Ishrat Zahan ◽

Md. Masudul Karim ◽

Shahin Imran ◽

Charles T. Hunter ◽

...

Keyword(s):

Abiotic Stress ◽

Citric Acid ◽

Stress Tolerance ◽

Metabolic Networks ◽

Abiotic Stress Tolerance ◽

Heavy Metal Stress ◽

Stress Conditions ◽

Growth And Yield ◽

Antioxidant Defense Systems ◽

Physiological Outcomes

Several recent studies have shown that citric acid/citrate (CA) can confer abiotic stress tolerance to plants. Exogenous CA application leads to improved growth and yield in crop plants under various abiotic stress conditions. Improved physiological outcomes are associated with higher photosynthetic rates, reduced reactive oxygen species, and better osmoregulation. Application of CA also induces antioxidant defense systems, promotes increased chlorophyll content, and affects secondary metabolism to limit plant growth restrictions under stress. In particular, CA has a major impact on relieving heavy metal stress by promoting precipitation, chelation, and sequestration of metal ions. This review summarizes the mechanisms that mediate CA-regulated changes in plants, primarily CA’s involvement in the control of physiological and molecular processes in plants under abiotic stress conditions. We also review genetic engineering strategies for CA-mediated abiotic stress tolerance. Finally, we propose a model to explain how CA’s position in complex metabolic networks involving the biosynthesis of phytohormones, amino acids, signaling molecules, and other secondary metabolites could explain some of its abiotic stress-ameliorating properties. This review summarizes our current understanding of CA-mediated abiotic stress tolerance and highlights areas where additional research is needed.

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Utilization of genes encoding osmoprotectants in transgenic plants for enhanced abiotic stress tolerance

Electronic Journal of Biotechnology ◽

10.1016/j.ejbt.2015.04.002 ◽

2015 ◽

Vol 18 (4) ◽

pp. 257-266 ◽

Cited By ~ 49

Author(s):

Mohammad Sayyar Khan ◽

Dawood Ahmad ◽

Muhammad Adil Khan

Keyword(s):

Abiotic Stress ◽

Transgenic Plants ◽

Stress Tolerance ◽

Abiotic Stress Tolerance ◽

Genes Encoding

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Enhanced Abiotic Stress Tolerance of Vicia faba L. Plants Heterologously Expressing the PR10a Gene from Potato

Plants ◽

10.3390/plants10010173 ◽

2021 ◽

Vol 10 (1) ◽

pp. 173

Author(s):

Abeer F. Desouky ◽

Ahmed H. Ahmed ◽

Hartmut Stützel ◽

Hans-Jörg Jacobsen ◽

Yi-Chen Pao ◽

...

Keyword(s):

Salt Stress ◽

Abiotic Stress ◽

Stress Tolerance ◽

Vicia Faba ◽

Faba Bean ◽

Abiotic Stress Tolerance ◽

Wild Type ◽

Stress Injury ◽

Bean Plants ◽

Vicia Faba L

Pathogenesis-related (PR) proteins are known to play relevant roles in plant defense against biotic and abiotic stresses. In the present study, we characterize the response of transgenic faba bean (Vicia faba L.) plants encoding a PR10a gene from potato (Solanum tuberosum L.) to salinity and drought. The transgene was under the mannopine synthetase (pMAS) promoter. PR10a-overexpressing faba bean plants showed better growth than the wild-type plants after 14 days of drought stress and 30 days of salt stress under hydroponic growth conditions. After removing the stress, the PR10a-plants returned to a normal state, while the wild-type plants could not be restored. Most importantly, there was no phenotypic difference between transgenic and non-transgenic faba bean plants under well-watered conditions. Evaluation of physiological parameters during salt stress showed lower Na+-content in the leaves of the transgenic plants, which would reduce the toxic effect. In addition, PR10a-plants were able to maintain vegetative growth and experienced fewer photosystem changes under both stresses and a lower level of osmotic stress injury under salt stress compared to wild-type plants. Taken together, our findings suggest that the PR10a gene from potato plays an important role in abiotic stress tolerance, probably by activation of stress-related physiological processes.

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