Publications of NIPGR Scientists

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Author: search.filters.author.Mali, Komal VitthalraoSubject: search.filters.subject.stress tolerance

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    Combined drought and heat stress influences the root water relation and determine the dry root rot disease development under field conditions: A study using contrasting chickpea genotypes
    (Frontiers Media S.A., 2022) Chilakala, Aswin Reddy; Mali, Komal Vitthalrao; Irulappan, Vadivelmurugan; Patil, Basavanagouda S.; Pandey, Prachi; Rangappa, Krishnappa; Ramegowda, Venkategowda; Kumar, M. Nagaraj; Puli, Chandra Obul Reddy; Mohan-Raju, Basavaiah; Senthil-Kumar, Muthappa
    Abiotic stressors such as drought and heat predispose chickpea plants to pathogens of key importance leading to significant crop loss under field conditions. In this study, we have investigated the influence of drought and high temperature on the incidence and severity of dry root rot disease (caused by Macrophomina phaseolina) in chickpea, under extensive on- and off-season field trials and greenhouse conditions. We explored the association between drought tolerance and dry root rot resistance in two chickpea genotypes, ICC 4958 and JG 62, with contrasting resistance to dry root rot. In addition, we extensively analyzed various patho-morphological and root architecture traits altered by combined stresses under field and greenhouse conditions in these genotypes. We further observed the role of edaphic factors in dry root rot incidence under field conditions. Altogether, our results suggest a strong negative correlation between the plant water relations and dry root rot severity in chickpeas, indicating an association between drought tolerance and dry root rot resistance. Additionally, the significant role of heat stress in altering the dynamics of dry root rot and the importance of combinatorial screening of chickpea germplasm for dry root rot resistance, drought, and heat stress have been revealed.
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    Regulation of stress responses in plants by calcium dependent protein kinases
    (John Wiley & Sons, 2021) Deepika; Mali, Komal Vitthalrao; Kumar, Amit; Singh, Amarjeet
    Calcium‐dependent protein kinases (CDPKs) represent the group of major calcium (Ca2+) sensors in plants. CDPKs comprise of peculiar structural features due to which they play a dual role of “Ca2+ sensor and responder” and decode the message from specific Ca2+ signature to phosphorylation events. Onset of most of the stresses results in increase in cytosolic Ca2+ level in plant cell. In depth functional analyses across plant species showed regulation of CDPK transcripts, activity, protein interactions and substrate targeting under biotic and abiotic stresses. Thus, vital role of CDPKs is proposed in transduction of stress triggered Ca2+ signaling to adaptive responses in plants. Genetic manipulations using CDPK genes could be vital in the agricultural biotechnology for imparting tolerance to biotic and abiotic stress, and better productivity. In this chapter, we provide an overview and update of CDPK gene family organization, CDPK domain structure and regulatory mechanism, the role of various CDPKs in abiotic stress, biotic stress signaling and responses in the model and crop plants.