Impacts of salt stress on the growth and physiological characteristics of Panicum virgatum seedlings

An experiment was conducted in an artificial climate chamber to study the growth and physiological characteristics of switchgrass (Panicum virgatum) seedlings exposed to 0, 50, 100, 150, and 200 mmol x L(-1) of NaCl solutions. With the increasing concentration of the NaCl, the seedling growth was ob...

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Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 23; no. 6; p. 1476
Main Authors Fan, Xi-Feng, Hou, Xin-Cun, Zhu, Yi, Wu, Ju-Ying
Format Journal Article
LanguageChinese
Published China 01.06.2012
Subjects
Panicum - growth & development
Panicum - physiology
Salt-Tolerance - physiology
Seedlings - growth & development
Seedlings - physiology
Sodium Chloride - pharmacology
Stress, Physiological
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Summary:An experiment was conducted in an artificial climate chamber to study the growth and physiological characteristics of switchgrass (Panicum virgatum) seedlings exposed to 0, 50, 100, 150, and 200 mmol x L(-1) of NaCl solutions. With the increasing concentration of the NaCl, the seedling growth was obviously inhibited. The plant height decreased, leaves became smaller, photosynthetic leaf area and net photosynthetic rate reduced, and dry matter accumulation decreased significantly, presenting the general traits of glycophyte. Meanwhile, the seedlings also showed relatively high salt tolerance. After exposed to 200 mmol x L(-1) of NaCl for 30 days, the seedlings still survived, with the green leaf area per plant and net photosynthetic rate being 491.9 cm2 and 0.93 micromol CO2 x m(-2) x s(-1), respectively. In this experiment, the salt tolerance threshold for P. virgatum was 178.6 mmol L(-1) when taking 50% drop in biomass as the standard.
ISSN:1001-9332