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Nitrate accumulation and growth of Aster tripolium L. with a continuous and intermittent nitrogen supply *
Author(s) -
STIENSTRA A. W.
Publication year - 1986
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/1365-3040.ep11611701
Subject(s) - halophyte , shoot , ecotype , nitrate , chemistry , dry weight , nutrient , nitrogen , salt marsh , zoology , botany , biology , ecology , salinity , organic chemistry
The ‘tidal salt marsh’ ecotype of the halophyte Aster tripolium L. was grown in a nutrient solution with either a continuous or an intermittent NO 3 − supply with either Cl − or SO 4 2− as the alternative anion. With increasing periods of NO 3 − supply per week the rate of the dry weight increment increased. When NO 3 − was supplied for longer than 48 h per week, the dry weight and the organic‐N content in the shoots hardly increased, whereas the NO 3 − content in shoots and roots increased further. With alternated supply of a nutrient solution containing NO 3 − with one containing Cl − , the internal NO 3 − content in the shoot was lower than in shoots grown in solutions in which NO 3 − alternated with SO 4 2− . It is concluded, that NO 3 − does not have a specific function in osmoregulation.