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Journal of Zhejiang University SCIENCE B 2009 Vol.10 No.8 P.563~571


Different responses of two Mosla species to potassium limitation in relation to acid rain deposition

Author(s):  Meng WANG, Bao-jing GU, Ying GE, Zhen LIU, De-an JIANG, Scott X. CHANG, Jie CHANG

Affiliation(s):  College of Life Sciences, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   jchang@zju.edu.cn

Key Words:  Ecophysiological response, Endangered species, Morphological plasticity, Mosla species, Weed

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Meng WANG, Bao-jing GU, Ying GE, Zhen LIU, De-an JIANG, Scott X. CHANG, Jie CHANG. Different responses of two Mosla species to potassium limitation in relation to acid rain deposition[J]. Journal of Zhejiang University Science B, 2009, 10(8): 563~571.

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journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T Different responses of two Mosla species to potassium limitation in relation to acid rain deposition
%A Meng WANG
%A Bao-jing GU
%A Ying GE
%A Zhen LIU
%A De-an JIANG
%A Scott X. CHANG
%J Journal of Zhejiang University SCIENCE B
%V 10
%N 8
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%D 2009
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0920037

T1 - Different responses of two Mosla species to potassium limitation in relation to acid rain deposition
A1 - Meng WANG
A1 - Bao-jing GU
A1 - Ying GE
A1 - Zhen LIU
A1 - De-an JIANG
A1 - Scott X. CHANG
A1 - Jie CHANG
J0 - Journal of Zhejiang University Science B
VL - 10
IS - 8
SP - 563
EP - 571
%@ 1673-1581
Y1 - 2009
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B0920037

The increasingly serious problem of acid rain is leading to increased potassium (K) loss from soils, and in our field investigation, we found that even congenerically relative Mosla species show different tolerance to K-deficiency. A hydroponic study was conducted on the growth of two Mosla species and their morphological, physiological and stoichiometric traits in response to limited (0.35 mmol K/L), normal (3.25 mmol K/L) and excessive (6.50 mmol K/L) K concentrations. Mosla hangchowensis is an endangered plant, whereas Mosla dianthera a widespread weed. In the case of M. hangchowensis, in comparison with normal K concentration, K-limitation induced a significant reduction in net photosynthetic rate (Pn), soluble protein content, and superoxide dismutase (SOD) activity, but an increase in malondialdehyde (MDA) concentration. However, leaf mass ratio (LMR) and root mass ratio (RMR) were changed little by K-limitation. In contrast, for M. dianthera, K-limitation had little effect on Pn, soluble protein content, SOD activity, and MDA concentration, but increased LMR and RMR. Critical values of N (nitrogen):K and K:P (phosphorus) ratios in the shoots indicated that limitation in acquiring K occurred under K-limited conditions for M. hangchowensis but not for M. dianthera. We found that low K content in natural habitats was a restrictive factor in the growth and distribution of M. hangchowensis, and soil K-deficiency caused by acid rain worsened the situation of M. hangchowensis, while M. dianthera could well acclimate to the increasing K-deficiency. We suggest that controlling the acid rain and applying K fertilizers may be an effective way to rescue the endangered M. hangchowensis.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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