Exogenous salicylic acid ameliorates heat stress-induced damages and improves growth and photosynthetic efficiency in alfalfa (Medicago sativa L.)

Wassie, Misganaw; Zhang, Weihong; Zhang, Qiang; Ji, Kang; Cao, Liwen; Chen, Liang

doi:10.1016/j.ecoenv.2020.110206

Cited by 116 publications

(59 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another study showed that H 2 O 2 -mediated SA prevented the pollen abortion caused by heat stress [127]. In Medicago sativa L., SA treatments triggered the heat shock proteins in the organelles and improved the activity of PSII and altered the rate of electron transport, thereby reducing the damage caused by heat stress [128]. These findings indicate the role of SA in regulating the antioxidant defense system and improving the photosynthetic efficiency of plants, resulting in enhanced thermotolerance [126][127][128][129].…”

Section: Role Of Salicylic Acid During High Temperaturesmentioning

confidence: 93%

Role of Reactive Oxygen Species and Hormones in Plant Responses to Temperature Changes

Devireddy

Tschaplinski

Tuskan

et al. 2021

IJMS

View full text Add to dashboard Cite

Temperature stress is one of the major abiotic stresses that adversely affect agricultural productivity worldwide. Temperatures beyond a plant’s physiological optimum can trigger significant physiological and biochemical perturbations, reducing plant growth and tolerance to stress. Improving a plant’s tolerance to these temperature fluctuations requires a deep understanding of its responses to environmental change. To adapt to temperature fluctuations, plants tailor their acclimatory signal transduction events, and specifically, cellular redox state, that are governed by plant hormones, reactive oxygen species (ROS) regulatory systems, and other molecular components. The role of ROS in plants as important signaling molecules during stress acclimation has recently been established. Here, hormone-triggered ROS produced by NADPH oxidases, feedback regulation, and integrated signaling events during temperature stress activate stress-response pathways and induce acclimation or defense mechanisms. At the other extreme, excess ROS accumulation, following temperature-induced oxidative stress, can have negative consequences on plant growth and stress acclimation. The excessive ROS is regulated by the ROS scavenging system, which subsequently promotes plant tolerance. All these signaling events, including crosstalk between hormones and ROS, modify the plant’s transcriptomic, metabolomic, and biochemical states and promote plant acclimation, tolerance, and survival. Here, we provide a comprehensive review of the ROS, hormones, and their joint role in shaping a plant’s responses to high and low temperatures, and we conclude by outlining hormone/ROS-regulated plant responsive strategies for developing stress-tolerant crops to combat temperature changes.

show abstract

Section: Role Of Salicylic Acid During High Temperaturesmentioning

confidence: 93%

Role of Reactive Oxygen Species and Hormones in Plant Responses to Temperature Changes

Devireddy

Tschaplinski

Tuskan

et al. 2021

IJMS

View full text Add to dashboard Cite

show abstract

“…Changes in planting density also caused content changes of some plant hormones, such as SA, JA and IAA (Figure 2). SA and JA play pivotal roles in the regulation of plant biotic and abiotic stress responses (Kazan, 2015;Rekhter et al, 2019;Wassie et al, 2020). Previous study demonstrated that plants could balance their growth and defense responses through JA signaling pathway under shade condition induced by high-density planting (Liu et al, 2019); SA affect the antioxidative metabolism and modulate cellular redox homeostasis (Janda et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Planting Density Affects Panax notoginseng Growth and Ginsenoside Accumulation by Balancing Primary and Secondary Metabolism

Liu

Wang

et al. 2021

Front. Plant Sci.

View full text Add to dashboard Cite

Adjusting planting density is a common agricultural practice used to achieve maximum yields. However, whether the quality of medicinal herbs can be improved by implementing appropriate planting densities is still uncertain. The medicinal crop Panax notoginseng was used to analyze the effects of planting density on growth and ginsenoside accumulation, and the possible mechanisms of these effects were revealed through metabonomics. The results showed that P. notoginseng achieved high ginsenoside accumulation at high planting densities (8 × 8 and 10 × 10 cm), while simultaneously achieved high biomass and ginsenoside accumulation at moderate planting density of 15 × 15 cm. At the moderate planting density, the primary metabolism (starch and sucrose metabolism) and secondary metabolism (the biosynthesis of phytohormone IAA and ginsenoside) of the plants were significantly enhanced. However, the strong intraspecific competition at the high planting densities resulted in stress as well as the accumulation of phytohormones (SA and JA), antioxidants (gentiobiose, oxalic acid, dehydroascorbic acid) and other stress resistance-related metabolites. Interestingly, the dry biomass and ginsenoside content were significantly lower at low densities (20 × 20 and 30 × 30 cm) with low intraspecific competition, which disturbed normal carbohydrate metabolism by upregulating galactose metabolism. In summary, an appropriate planting density was benefit for the growth and accumulation of ginsenosides in P. notoginseng by balancing primary metabolism and secondary metabolism.

show abstract

“…Heat stress adversely affects plant growth by reduced chlorophyll contents and induction of oxidative stress due to accumulation of hydroxyl (OH − ), hydroperoxyl (HO 2− ), alkoxy (RO − ), and superoxide (O 2− ) radicals. Oxidative stress hinders photosynthesis and respiratory activities, disrupts protein structure, and membrane integrity ( Wassie et al, 2020 ). Heat stress causes burning of leaves and branches, patch formation on leaves, reduction in germination and growth, reduced tillering, and reduction of grain size and grain yield ( Fahad et al, 2017 ).…”

Section: Role Of Transcription Factors Under Abiotic Stressesmentioning

confidence: 99%

Harnessing the potential of plant transcription factors in developing climate resilient crops to improve global food security: Current and future perspectives

Shahzad

Jamil

Ahmad

et al. 2021

Saudi Journal of Biological Sciences

View full text Add to dashboard Cite

Crop plants should be resilient to climatic factors in order to feed ever-increasing populations. Plants have developed stress-responsive mechanisms by changing their metabolic pathways and switching the stress-responsive genes. The discovery of plant transcriptional factors (TFs), as key regulators of different biotic and abiotic stresses, has opened up new horizons for plant scientists. TFs perceive the signal and switch certain stress-responsive genes on and off by binding to different cis -regulatory elements. More than 50 families of plant TFs have been reported in nature. Among them, DREB, bZIP, MYB, NAC, Zinc-finger, HSF, Dof, WRKY, and NF-Y are important with respect to biotic and abiotic stresses, but the potential of many TFs in the improvement of crops is untapped. In this review, we summarize the role of different stress-responsive TFs with respect to biotic and abiotic stresses. Further, challenges and future opportunities linked with TFs for developing climate-resilient crops are also elaborated.

show abstract

Exogenous salicylic acid ameliorates heat stress-induced damages and improves growth and photosynthetic efficiency in alfalfa (Medicago sativa L.)

Cited by 116 publications

References 59 publications

Role of Reactive Oxygen Species and Hormones in Plant Responses to Temperature Changes

Role of Reactive Oxygen Species and Hormones in Plant Responses to Temperature Changes

Planting Density Affects Panax notoginseng Growth and Ginsenoside Accumulation by Balancing Primary and Secondary Metabolism

Harnessing the potential of plant transcription factors in developing climate resilient crops to improve global food security: Current and future perspectives

Contact Info

Product

Resources

About