Karrikin1 Enhances Drought Tolerance in Creeping Bentgrass in Association with Antioxidative Protection and Regulation of Stress-Responsive Gene Expression

Tan, Zhen-Zhen; Wang, Yiting; Zhang, Xiaxiang; Jiang, Heng-Yue; Li, Ya; Zhuang, Lili; Yu, Jingjin; Yang, Ziyin

doi:10.3390/agronomy13030675

Cited by 4 publications

(3 citation statements)

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“…Karrikins have significant roles in mediating abiotic stress tolerance in plants due to their structural similarity with strigolactones [ 90 , 91 ]. KAR enhanced drought tolerance in creeping bentgrass ( Agrostis stolonifera ) in association with antioxidative protection and regulation of stress-responsive gene expression [ 92 ]. Ma et al [ 39 ] reported the upregulated expression of a secretory protein (33 kDa) related to KAR in rice plants under long-term Si-mediated Cd stress tolerance.…”

Section: Discussionmentioning

confidence: 99%

Novel insights into the mechanism(s) of silicon-induced drought stress tolerance in lentil plants revealed by RNA sequencing analysis

Biju,

Fuentes,

Gupta

2023

BMC Plant Biol

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Background Lentil is an essential cool-season food legume that offers several benefits in human nutrition and cropping systems. Drought stress is the major environmental constraint affecting lentil plants’ growth and productivity by altering various morphological, physiological, and biochemical traits. Our previous research provided physiological and biochemical evidence showing the role of silicon (Si) in alleviating drought stress in lentil plants, while the molecular mechanisms are still unidentified. Understanding the molecular mechanisms of Si-mediated drought stress tolerance can provide fundamental information to enhance our knowledge of essential gene functions and pathways modulated by Si during drought stress in plants. Thus, the present study compared the transcriptomic characteristics of two lentil genotypes (drought tolerant-ILL6002; drought sensitive-ILL7537) under drought stress and investigated the gene expression in response to Si supplementation using high-throughput RNA sequencing. Results This study identified 7164 and 5576 differentially expressed genes (DEGs) from drought-stressed lentil genotypes (ILL 6002 and ILL 7537, respectively), with Si treatment. RNA sequencing results showed that Si supplementation could alter the expression of genes related to photosynthesis, osmoprotection, antioxidant systems and signal transduction in both genotypes under drought stress. Furthermore, these DEGs from both genotypes were found to be associated with the metabolism of carbohydrates, lipids and proteins. The identified DEGs were also linked to cell wall biosynthesis and vasculature development. Results suggested that Si modulated the dynamics of biosynthesis of alkaloids and flavonoids and their metabolism in drought-stressed lentil genotypes. Drought-recovery-related DEGs identified from both genotypes validated the role of Si as a drought stress alleviator. This study identified different possible defense-related responses mediated by Si in response to drought stress in lentil plants including cellular redox homeostasis by reactive oxygen species (ROS), cell wall reinforcement by the deposition of cellulose, lignin, xyloglucan, chitin and xylan, secondary metabolites production, osmotic adjustment and stomatal closure. Conclusion Overall, the results suggested that a coordinated interplay between various metabolic pathways is required for Si to induce drought tolerance. This study identified potential genes and different defence mechanisms involved in Si-induced drought stress tolerance in lentil plants. Si supplementation altered various metabolic functions like photosynthesis, antioxidant defence system, osmotic balance, hormonal biosynthesis, signalling, amino acid biosynthesis and metabolism of carbohydrates and lipids under drought stress. These novel findings validated the role of Si in drought stress mitigation and have also provided an opportunity to enhance our understanding at the genomic level of Si’s role in alleviating drought stress in plants.

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Section: Discussionmentioning

confidence: 99%

Novel insights into the mechanism(s) of silicon-induced drought stress tolerance in lentil plants revealed by RNA sequencing analysis

Biju,

Fuentes,

Gupta

2023

BMC Plant Biol

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“…Therefore, karrikins interact directly with ABA-regulating genes to regulate stress adaptability [61]. Improved drought tolerance in herbaceous weeds is associated with the activation of genes responding to karrikin, and the transcription factors of genes related to the increased expression capacity of antioxidants [62]. Karrikins decrease oxidative stresses resulting from drought, salinity and heavy metals by increasing the expression of different enzymes and genes involved in stress mitigation.…”

Section: Karrikins As Protective Agents Against Abiotic Stressmentioning

confidence: 99%

The Impact of Post-Fire Smoke on Plant Communities: A Global Approach

Zahed,

Bączek-Kwinta

2023

Plants

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Smoke is one of the fire-related cues that can alter vegetation communities’ compositions, by promoting or excluding different plant species. For over 30 years, smoke-derived compounds have been a hot topic in plant and crop physiology. Research in this field was initiated in fire-prone areas in Australia, South Africa and some countries of both Americas, mostly with Mediterranean-type climates. Then, research extended to regions with moderate climates, like Central European countries; this was sometimes determined by the fact that in those regions, extensive prescribed or illegal burning (swailing) occurs. Hence, this review updates information about the effects of smoke compounds on plant kingdoms in different regions. It also focuses on research advances in the field of the physiological effects of smoke chemicals, mostly karrikins, and attempts to gather and summarize the current state of research and opinions on the roles of such compounds in plants’ lives. We finish our review by discussing major research gaps, which include issues such as why plants that occur in non-fire-prone areas respond to smoke chemicals. Have recent climate change and human activities increased the risk of wildfires, and how may these affect local plant communities through physiologically active smoke compounds? Is the response of seeds to smoke and smoke compounds an evolutionarily driven trait that allows plants to adapt to the environment? What can we learn by examining post-fire smoke on a large scale?

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“…Therefore, karrikins interact directly with ABA-regulating genes to regulate stress adaptability [51]. Improved drought tolerance in herbaceous weeds is associated with activation of genes responding to karrikin and transcription factors of genes related to increased expression capacity of antioxidants [52]. Karrikins decrease oxidative stresses resulted from drought, salinity and heavy metals by increasing the expression of different enzymes and genes involved in stress mitigation.…”

Section: Common Physiological Mechanisms Of Smoke Compounds On Plant ...mentioning

confidence: 99%

The Impact of Post-Fire Smoke on Ecosystems All over the World

Zahed,

Kwinta

2023

Preprint

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Fire-related cues could alter vegetation community composition by promoting or excluding different types of plants. Smoke-derived compounds have been a hot topic in plant and crop physiology. There are some fire-prone areas in Australia, both Americas, some Mediterranean countries and regions with extensive prescribed or illegal burning like central European, which are subjected to a direct impact of fire (heat, minerals accumulation from the burning matter) and/or the indirect one (smoke) and undergo compositional and structural changes. This review first updates information about the effect of the compounds on plants' kingdoms and focuses on the research advances in the field of smoke compounds and attempts to gather and summarize the recent state of research and opinions on the role of smoke-derived compounds in plants' lives. We finish our review by discussing major research gaps, which include: Why plants respond to smoke chemicals? Is the response of seeds to smoke and smoke compounds an evolutionary-driven trait allowing plants to adapt to local environment?

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Karrikin1 Enhances Drought Tolerance in Creeping Bentgrass in Association with Antioxidative Protection and Regulation of Stress-Responsive Gene Expression

Cited by 4 publications

References 58 publications

Novel insights into the mechanism(s) of silicon-induced drought stress tolerance in lentil plants revealed by RNA sequencing analysis

Novel insights into the mechanism(s) of silicon-induced drought stress tolerance in lentil plants revealed by RNA sequencing analysis

The Impact of Post-Fire Smoke on Plant Communities: A Global Approach

The Impact of Post-Fire Smoke on Ecosystems All over the World

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