Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 22, Issue 4, Pages 3068-3081Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-014-3551-y
Keywords
Aluminum; Antioxidant enzyme activities; Hydrogen sulfide; Nutrients concentration; Oilseed rape; Plant growth; Ultrastructural study
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Funding
- National High Technology Research and Development Program of China [2011AA10A206, 2013AA103007]
- Special Fund for Agro-scientific Research in the Public Interest [201303022]
- National Natural Science Foundation of China [31170405]
- Science and Technology Department of Zhejiang Province [2012C12902-1]
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In the present study, ameliorating role of hydrogen sulfide (H2S) in oilseed rape (Brassica napus L.) was studied with or without application of H2S donor sodium hydrosulfide (NaHS) (0.3 mM) in hydroponic conditions under three levels (0, 0.1 and 0.3 mM) of aluminum (Al). Results showed that addition of H2S significantly improved the plant growth, photosynthetic gas exchange, and nutrients concentration in the leaves and roots of B. napus plants under Al stress. Exogenously applied H2S significantly lowered the Al concentration in different plant parts, and reduced the production of malondialdehyde and reactive oxygen species by improving antioxidant enzyme activities in the leaves and roots under Al stress. Moreover, the present study indicated that exogenously applied H2S improved the cell structure and displayed clean mesophyll and root tip cells. The chloroplast with well-developed thylakoid membranes could be observed in the micrographs. Under the combined application of H2S and Al, a number of modifications could be observed in root tip cell, such as mitochondria, endoplasmic reticulum, and golgi bodies. Thus, it can be concluded that exogenous application of H2S under Al stress improved the plant growth, photosynthetic parameters, elements concentration, and biochemical and ultrastructural changes in leaves and roots of B. napus.
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