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Author: search.filters.author.Soundararajan, PrabhakaranSubject: search.filters.subject.Heat stress

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    Genome-wide identification, characterization, and expression analysis of Clavata3 Insensitive receptor Kinases (CIKs) on developmental tissues and under temperature stress conditions in Brassica oleracea
    (Springer Nature Publishing AG, 2025) Suresh, Gokul Babu; Baskar, Harssitha; Subramaniam, Geethanjali; Soundararajan, Prabhakaran
    Unprecedented climate changes are one of the major global threats to agriculture. Though cauliflower is grown worldwide in different conditions, it is sensitive to temperature fluctuation. Clavata3 Insensitive receptor Kinase (CIK) is one of the important co-receptors involved in WUS-CLV pathway for shoot apical meristem (SAM) maintenance, floral development and environment buffering. In this study we did genome-wide identification and characterization of CIKs in Brassica oleracea var. botrytis cv. Korso. Expression analysis was conducted on developmental tissues and short-term heat and cold stress conditions. Seven fulllength BolCIKs have been identified in the Korso genome through comparison against Arabidopsis thaliana CIKs. Gene structure and motifs are distinct between each sub-class. Ka/Ks ratios showed that all CIKs underwent purifying selection. Abundance of stress-responsive cis-elements, such as MYB and MYC recognition sites, showed the involvement of BolCIK in environmental stress regulation. Among the nine developmental tissues such as leaf, stem, root, curd, sepal, petal, stamen, pistil, and silique, except BolCIK4 and BolCIK5a, CIKs were merely detected in leaves. Contrastingly, expression of all BolCIKs was detected in stem, curd, and reproductive organs. Importantly, most of the BolCIKs were highly expressed in sepal, petal, pistil, and siliques. In SAM specific manner, BolCIK3 and BolCIK6 are upregulated in heat stress and cold stress, respectively. Other BolCIKs expressions are varying between tissues-types and stress conditions. Since CIKs can possibly be involved in thermomorphogenesis, results of this work may lead to further exploration of its function to improve climate resilience in cauliflower.
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    Heat stress mitigation by silicon nutrition in plants: A comprehensive overview
    (Springer Nature Publishing AG, 2023) Shilpha, Jayabalan; Manivannan, Abinaya; Soundararajan, Prabhakaran; Jeong, Byoung Ryong
    Rapid climatic changes have exacerbated the severity of extreme weather events in agricultural regions, such as rainfall, elevated temperatures, and drought stress. As a result, heat stress (HS) has emerged as one of the most serious abiotic risks to crop development, productivity, and nutritional security due to the continued rise in global mean temperature. According to the IPCC, average global temperatures will rise by 3–6 °C by 2100. Importantly, excessive temperature stress during the reproductive stage results in a significant reduction of crop output. Consequently, there is an urgent need to comprehend food crops’ response and tolerance mechanisms to heat stress. Plants respond to high-temperature stress by initiating a series of physiological, biochemical, and molecular events and adapt by activating many stress-responsive genes. Silicon (Si) is a subtle element that improves plant growth and development and protects it against numerous abiotic and biotic challenges. Several studies have proved that the exogenous application of Si has significantly mitigated the negative impacts of abiotic stresses. However, there have only been a few investigations on the Si’s role in reducing the deleterious consequences of heat stress. Therefore, this chapter summarizes the heat-induced responses and damages in plants. In a few examples, we discuss the versatile functions of Si in mitigating abiotic stresses, including heat stress and Si-mediated molecular mechanisms of heat stress tolerance.