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Publication Type J
Authors Zhou, J. C., W. W. Zhao, C. H. Yin, J. Song, B. S. Wang, J. L. Fan and G. Feng
Title The role of cotyledons in the establishment of Suaeda physophora seedlings
Source Plant Biosystems
Author Keywords salt tolerance ion compartmentalization Halophyte oxygen evolution salinity seed-germination salt tolerance haloxylon-ammodendron saline environments temperature halophyte growth ion accumulation adaptation
Abstract The role of cotyledons in seedling establishment of the euhalophyte Suaeda physophora under non-saline and saline conditions (addition of 1mM or 400mM NaCl) was investigated. Survival and fresh and dry weights were greater for seedlings grown in the light (12-h light/12-h dark) than in the dark (24-h dark). The shading of cotyledons tended to decrease shoot height, shoot organic dry weight, number of leaves, and survival of seedlings regardless of NaCl treatment, but the effect of cotyledon shading was greater with 400mM NaCl. Concentrations of Na+ were higher in cotyledons than in leaves, regardless of NaCl treatment. The K+/Na+ ratio was lower in cotyledons than in leaves for seedlings treated with 1mM NaCl but not for seedlings treated with 400mM NaCl. Addition of 400mM NaCl decreased oxygen production in cotyledons but especially in leaves. These results are consistent with the hypothesis that, by generating oxygen via photosynthesis and by compartmentalizing Na+, cotyledons are crucial for the establishment of S. physophora seedlings in saline environments.
Author Address [Zhou, J. C.; Zhao, W. W.; Song, J.; Wang, B. S.] Shandong Normal Univ, Coll Life Sci, Key Lab Plant Stress, Jinan 250014, Peoples R China. [Feng, G.] China Agr Univ, Coll Resource & Environm Sci, Beijing, Peoples R China. [Yin, C. H.] Acad Sinica, Inst Ecol & Geog, Xinjiang, Peoples R China. [Fan, J. L.] Henan Acad Sci, Isotope Inst, Zhengzhou, Peoples R China. Song, J (reprint author), Shandong Normal Univ, Coll Life Sci, Wenhua East Rd 88, Jinan 250014, Peoples R China. songjieever@163.com
ISSN 1126-3504
ISBN 1126-3504
29-Character Source Abbreviation Plant Biosyst.
Publication Date Jul
Year Published 2014
Volume 148
Issue 4
Beginning Page 584-590
Digital Object Identifier (DOI) 10.1080/11263504.2013.788574
Unique Article Identifier WOS:000343231500002
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