Seed Halopriming: A Promising Strategy to Induce Salt Tolerance in Indonesian Pigmented Rice

Purwestri, Yekti Asih and Nurbaiti, Siti and Putri, Sekar Pelangi Manik and Wahyuni, Ignasia Margi and Yulyani, Siti Roswiyah and Sebastian, Alfino and Nuringtyas, Tri Rini and Yamaguchi, Nobutoshi (2023) Seed Halopriming: A Promising Strategy to Induce Salt Tolerance in Indonesian Pigmented Rice. Plants, 12 (15). ISSN 22237747

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Abstract

Unfavorable environmental conditions and climate change impose stress on plants, causing yield losses worldwide. The Indonesian pigmented rice (Oryza sativa L.) cultivars Cempo Ireng Pendek (black rice) and Merah Kalimantan Selatan (red rice) are becoming popular functional foods due to their high anthocyanin contents and have great potential for widespread cultivation. However, their ability to grow on marginal, high-salinity lands is limited. In this study, we investigated whether seed halopriming enhances salt tolerance in the two pigmented rice cultivars. The non-pigmented cultivars IR64, a salt-stress-sensitive cultivar, and INPARI 35, a salt tolerant, were used as control. We pre-treated seeds with a halopriming solution before germination and then exposed the plants to a salt stress of 150 mM NaCl at 21 days after germination using a hydroponic system in a greenhouse. Halopriming was able to mitigate the negative effects of salinity on plant growth, including suppressing reactive oxygen species accumulation, increasing the membrane stability index (up to two-fold), and maintaining photosynthetic pigment contents. Halopriming had different effects on the accumulation of proline, in different rice varieties: the proline content increased in IR64 and Cempo Ireng Pendek but decreased in INPARI 35 and Merah Kalimantan Selatan. Halopriming also had disparate effects in the expression of stress-related genes: OsMYB91 expression was positively correlated with salt treatment, whereas OsWRKY42 and OsWRKY70 expression was negatively correlated with this treatment. These findings highlighted the potential benefits of halopriming in salt-affected agro-ecosystems. © 2023 by the authors.

Item Type: Article
Additional Information: Cited by: 3; All Open Access, Gold Open Access, Green Open Access
Uncontrolled Keywords: seed halopriming; salt tolerance; physiological responses; gene expression; pigmented rice
Subjects: Q Science > QK Botany
Divisions: Faculty of Biology > Master Program in Biology
Depositing User: Sri JUNANDI
Date Deposited: 06 Nov 2024 05:37
Last Modified: 06 Nov 2024 05:37
URI: https://ir.lib.ugm.ac.id/id/eprint/10823

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