Red-seaweed biostimulants differentially alleviate the impact of fungicidal stress in rice (Oryza sativa L.).

Autor: Banakar SN; Department of Plant Pathology, University of Agricultural Sciences, Bangalore, India., PrasannaKumar MK; Department of Plant Pathology, University of Agricultural Sciences, Bangalore, India. babu_prasanna@rediffmail.com., Mahesh HB; Department of Genetics and Plant Breeding, College of Agriculture, V. C. Farm, Mandya, India., Parivallal PB; Department of Plant Pathology, University of Agricultural Sciences, Bangalore, India., Puneeth ME; Department of Plant Pathology, University of Agricultural Sciences, Bangalore, India., Gautam C; Department of Plant Pathology, Agriculture University, Kota, India., Pramesh D; Rice Pathology Laboratory, All India Coordinated Rice Improvement Programme, Gangavathi, University of Agricultural Sciences, Raichur, India., Shiva Kumara TN; Department of Plant Pathology, University of Agricultural Sciences, Bangalore, India., Girish TR; Sea6 Energy, Pvt Ltd, Center for Cellular and Molecular Biology, (C-CAMP), Bangalore, India., Nori S; Sea6 Energy, Pvt Ltd, Center for Cellular and Molecular Biology, (C-CAMP), Bangalore, India., Narayan SS; Sea6 Energy, Pvt Ltd, Center for Cellular and Molecular Biology, (C-CAMP), Bangalore, India.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Apr 09; Vol. 12 (1), pp. 5993. Date of Electronic Publication: 2022 Apr 09.
DOI: 10.1038/s41598-022-10010-8
Abstrakt: Red seaweed-derived biostimulants facilitate plant health and impart protection against abiotic stress conditions by their bioactive compounds and plant nutrients. The potency of red seaweed biostimulants (LBS6 and LBD1) on rice cv. IR-64 in response to fungicides induced stress was investigated in this study. Foliar application of LBS6 maintained the stomatal opening and leaf temperature under the fungicidal stress condition. Reactive Oxygen Species (ROS) such as hydrogen peroxide and superoxide radicals were significantly reduced in LBS6-treated stressed plants. After applying seaweed biostimulants, ROS production was stabilized by antioxidants viz., CAT, APX, SOD, POD, and GR. LBS-6 application increased the Ca + and K + levels in the stressed plants, which perhaps interacted with ROS and stomatal opening signalling systems, respectively. In the rice plants, fungicidal stress elevated the expression of stress-responsive transcriptional factors (E2F, HSFA2A, HSFB2B, HSFB4C, HSFC1A, and ZIP12). A decline in the transcript levels of stress-responsive genes was recorded in seaweed treated plants. For the first time, we present an integrative investigation of physicochemical and molecular components to describe the mechanism by which seaweed biostimulants in rice improve plant health under fungicidal stress conditions.
(© 2022. The Author(s).)
Databáze: MEDLINE
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