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Influence of spermidine priming on rice (Oryza sativa) seed germinability and vigour under heat stress

Indian Agricultural Research Journals

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Title Influence of spermidine priming on rice (Oryza sativa) seed germinability and vigour under heat stress
 
Creator ARCHANA, H R
VIJAY, DUNNA
C T, MANJUNATH PRASAD
AHMAD, DILSHAD
M B, ARUN KUMAR
BHOWMICK, PROLAY KUMAR
SINHA, SUBODH KUMAR
SHARMA, D K
SUSHMITHA, L C
 
Subject α-Amylase activity, High-temperature stress, PEG, Seed Priming, Thermotolerance
 
Description Polyamines (PAs) play a vital role in plants' response to various abiotic stresses, including high temperature (HT) stress. The present study was carried out during 2020–23 at the Indian Agricultural Research Institute, New Delhi to explores how spermidine treatment affects rice (Oryza sativa L.) seeds' ability to withstand heat and the availability of sugars for seedling growth during the radicle stage in heat-susceptible (IR64) and tolerant (N22) varieties. The seeds were primed with 1 mM spermidine using PEG (-1 MPa) as the priming medium, followed by exposure to heat stress. Results showed that in unprimed seeds, heat stress significantly reduces the seed germination, vigour and sugar availability in both the varieties and to a greater extent in IR64 compared to N22. This difference resulted in a substantially lower percentage of normal seedlings and seed vigour index in IR64 than in N22. However, spermidine seed priming enhanced thermotolerance in both varieties, more in IR64, equating the normal seedling percentage and seedling growth with control, i.e. without heat stress. The priming treatment also notably augmented α-amylase activity and reducing sugar availability, particularly in N22, enabling better seedling growth under heat stress conditions. This study underscores the importance of seed priming with spermidine to allow the seedlings to tolerate elevated temperatures and maintain better seedling growth due to the enhanced availability of reducing sugars during germination and early seedling growth.
 
Publisher Indian Council of Agricultural Research
 
Date 2023-12-19
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJAgS/article/view/141044
10.56093/ijas.v93i12.141044
 
Source The Indian Journal of Agricultural Sciences; Vol. 93 No. 12 (2023); 1284–1290
2394-3319
0019-5022
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJAgS/article/view/141044/53426
 
Rights Copyright (c) 2023 The Indian Journal of Agricultural Sciences
https://creativecommons.org/licenses/by-nc-sa/4.0