TY - JOUR
T1 - A protective role for the polyamine spermine against drought stress in Arabidopsis
AU - Yamaguchi, Koji
AU - Takahashi, Yoshihiro
AU - Berberich, Thomas
AU - Imai, Akihiko
AU - Takahashi, Taku
AU - Michael, Anthony J.
AU - Kusano, Tomonobu
N1 - Funding Information:
We are grateful to Dr. Gerald Schönknecht for sincere discussion on the action of PAs on ion channels. We also thank Dr. T. Akiyama (Hokkaido Agricultural Research Center) for discussion on the role of PAs during abiotic stresses. This work was supported by a Grant from ‘The Salt Science Research Foundation (No. 0624)’ to T.K.
PY - 2007/1/12
Y1 - 2007/1/12
N2 - Cellular polyamine content often changes in response to abiotic stresses. However, its physiological relevance is unknown. We found that an Arabidopsis mutant plant (acl5/spms), which cannot produce spermine, is hypersensitive to high salt. Examination of drought sensitivity of the mutant and comparison with wild type plants indicated hypersensitivity to drought. This phenotype was cured by spermine pretreatment but not by the other polyamines putrescine and spermidine, suggesting that drought-hypersensitivity exhibited by the mutant is due to spermine deficiency. The water loss rate of wild type and mutant plants were similar until 20 min after onset of dehydration stress, but after a longer exposure the rate in mutant plants was higher than in wild type plants. Consistent with this result, the stomata of the mutant leaves remained open while in wild type leaves they closed. Based on the collected data, we discuss a role for spermine in response to drought stress.
AB - Cellular polyamine content often changes in response to abiotic stresses. However, its physiological relevance is unknown. We found that an Arabidopsis mutant plant (acl5/spms), which cannot produce spermine, is hypersensitive to high salt. Examination of drought sensitivity of the mutant and comparison with wild type plants indicated hypersensitivity to drought. This phenotype was cured by spermine pretreatment but not by the other polyamines putrescine and spermidine, suggesting that drought-hypersensitivity exhibited by the mutant is due to spermine deficiency. The water loss rate of wild type and mutant plants were similar until 20 min after onset of dehydration stress, but after a longer exposure the rate in mutant plants was higher than in wild type plants. Consistent with this result, the stomata of the mutant leaves remained open while in wild type leaves they closed. Based on the collected data, we discuss a role for spermine in response to drought stress.
KW - Arabidopsis thaliana
KW - Calcium homeostasis
KW - Drought-stress
KW - Polyamine
KW - Spermine
KW - Stomata
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U2 - 10.1016/j.bbrc.2006.11.041
DO - 10.1016/j.bbrc.2006.11.041
M3 - Article
C2 - 17118338
AN - SCOPUS:33751567118
SN - 0006-291X
VL - 352
SP - 486
EP - 490
JO - Biochemical and Biophysical Research Communications
JF - Biochemical and Biophysical Research Communications
IS - 2
ER -