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Effects of nitric oxide and nitrogen on seedling emergence, ion accumulation, and seedling growth under salinity in the euhalophyte Suaeda salsa
Author(s) -
Song Jie,
Shi Gongwei,
Xing Song,
Chen Min,
Wang Baoshan
Publication year - 2009
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/jpln.200800062
Subject(s) - seedling , salinity , shoot , halophyte , sodium nitroprusside , nitrate , nitrogen , chemistry , nitric oxide , sodium , salsa , biology , horticulture , botany , agronomy , ecology , environmental science , organic chemistry , greenwich , soil science
Recently nitric oxide (NO) has emerged as a key signal molecule in plants. However, little is known about the role of NO in the salt tolerance of halophytes. Effects of the NO donors sodium nitroprusside (SNP) and nitrate (NO $ _3^- $ ) on growth and ion accumulation in the euhalophyte Suaeda salsa under salinity were investigated in the present study. The results showed that higher SNP supply increased seedling emergence, but SNP had no effect on shoot growth and the concentrations of Na + , K + , Cl – , and NO $ _3^- $ . Higher NO $ _3^- $ had no effect on seedling emergence of the species. Shoot Cl – decreased, but NO 3 – increased markedly, with a higher NO $ _3^- $ supply. The decrease in the estimated contribution of Cl – to the osmotic potential was compensated for by an increase in that of NO $ _3^- $ . It appears that NO $ _3^- $ plays an important osmotic role in S. salsa under high salinity with a higher NO $ _3^- $ supply, and this trait may increase salt tolerance of the species under high salinity.