Management of excessive soil H plus ion induced toxicities by application of organic seaweed amendment enhances photosynthesis and resource use efficiencies in rice (Oryza sativa)

被引：5

作者：

Chanthini, Kanagaraj Muthu-Pandian ^{[1
]}

Pavithra, Ganesh-Subbaraja ^{[1
]}

Murugan, Ponnusamy ^{[1
]}

Malarvizhi, Pauldurai ^{[1
]}

Deva-Andrews, Arulsoosairaj ^{[1
]}

Ramasubramanian, Ramakrishnan ^{[1
]}

Thulasi-Raman, Narayanan ^{[1
]}

Malafaia, Guilherme ^{[2
,3
]}

Senthil-Nathan, Sengottayan ^{[1
]}

Prockow, Jaroslaw ^{[4
]}

机构：

[1] Manonmaniam Sundaranar Univ, Sri Paramakalyani Ctr Excellence Environm Sci, Tirunelveli 627412, Tamil Nadu, India

[2] Univ Fed Uberlandia, Postgrad Program Ecol Conservat & Biodivers, Uberlandia, MG, Brazil

[3] Goiano Fed Inst, Lab Toxicol Appl Environm, Rodovia Geraldo Silva Nascimento,2,5 Km,Urutai Cam, Urutai, GO, Brazil

[4] Wroclaw Univ Environm & Life Sci, Inst Environm Biol, Dept Plant Biol, Ul Kozuchowska 7a, PL-51631 Wroclaw, Poland

来源：

ENVIRONMENTAL RESEARCH | 2024年 / 247卷

关键词：

Abiotic stress; Metal ion toxicity; Water deficit; Soil conditioner; Super oxide dismutase; Ascorbate peroxidase; Photosynthetic rate; Nitrogen uptake; Biostimulant; Yield; GROWTH; EXTRACTS; PLANTS;

D O I：

10.1016/j.envres.2024.118179

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Globally, soil acidification is a serious environmental issue that reduces commercial agricultural production. Rice is subjected to nutritional stress due to acidic soil, which is a major impediment to rice production. Since acid soil threatens rice plants with soil compaction, nutrient loss, and plant stress-induced oxidative cell damage that results in affecting the photosynthetic system, restricting the availability of water, and reducing overall plant growth and productivity. Since contemporary soil acidification management strategies provide mediocre results, the use of Sargassum wightii seaweed-based biostimulants (BS) and soil amendments is sought as an environmentally friendly alternative strategy, and therefore its potential isevaluated in this study. BS was able to mediate soil quality by improving soil pH and structure along with facilitating nitrogen phytoavailability. BS also increased the activity of the antioxidant enzyme system, superoxide dismutase ((48%), peroxidase (76.6%), and ascorbate peroxidase (63.5%), aggregating the monaldehyde-mediating accumulation of osmoprotective proline in roots, that was evident from rapid initiation of root hair growth in treated seedlings. BS was also able to physiologically modulate photosynthetic activities and chlorophyll production (24.31%) in leaves, maintaining the efficiency of plant water use by regulating the stomatal conductance (0.91 mol/m/s) and the transpiration rate (13.2 mM/m/s). The BS compounds were also successful in facilitating nitrogen uptake resulting in improved plant growth (59%), tiller-panicle number, and yield (52.57%), demonstrating a resourceful nitrogen use efficiency (71.96%) previously affected by stress induced by acid soil. Therefore, the study affirms the competent potential of S. wightii-based soil amendment to be applied not only to improve soil quality, but also to increase plant production and yield.

引用

页数：11