首页|Deciphering the physiological response mechanisms of Miscanthus sinensis to salt-induced stress

Deciphering the physiological response mechanisms of Miscanthus sinensis to salt-induced stress

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  • NETL
  • NSTL
  • Elsevier
Soil salinization is a growing concern that degrades soil quality and inhibits agricultural productivity. Miscanthus species have received wide attention because of their high calorific potential, their value as an energy plant, and their ability to maintain high biomass accumulation. However, most studies focused on the biochemical and physiological responses to salt stress while neglecting the osmotic adjustment processes and the contribution of both organic and inorganic substances to these processes. This study evaluates the response mechanism of Miscanthus sinensis to salt stress (0-300 mM of NaCl) by evaluating the growth and photosynthetic parameters, photosynthetic response to light, and contribution of organic and inorganic substances to osmotic potential. The results revealed that M. sinensis adopted Na~+ compartmentalization and reallocation of biomass to the above-ground parts to mitigate the negative impact of salinity stress. Specifically, Na~+ accumulated more in the root and leaf, with an increment magnitude of 75.4-173.9 and 56.7-217.1 times, respectively. This was supported by the changing trend of the stem/leaf ratio (25.1 %-55.9 %) compared to the root/shoot ratio (12.3 %-18.3 %). Also, salt-induced stress decreased the leaf's water content and water use efficiency as a result of low intracel-lular osmosis, and to mitigate osmotic damage, M. sinensis enhanced the accumulation of proline. These results offer theoretical and scientific insights into managing the cultivation and improving the yield of M. sinensis and other energy herbaceous plants in saline soils.

Energy plantsMiscanthusSoil salinizationWater use efficiencyCompatible solutes

Hai-Long Lu、Ling Li、Jackson Nkoh Nkoh、Jian-Jian Li、Hao-Ran Wang、Xiao-Hui Li、Dong-Li Hao、Jun-Qin Zong

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Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China||Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, 210014, China

Guangdong Provincial Key Laboratory for Plant Epigenetics, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, 518060, China||Department of Chemistry, University of Buea, P.O. Box 63, Buea, Cameroon

2025

10.1016/j.biombioe.2025.107898

Biomass & bioenergy

Biomass & bioenergy

SCI
ISSN：0961-9534
年,卷(期)：2025.199(Aug.)
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