TY - JOUR
T1 - The effect on photosynthesis and osmotic regulation in Beta vulgaris L. var. Flavescens DC. by salt stress
AU - Choi, Deok Gyun
AU - Hwang, Jeong Sook
AU - Choi, Sung Chul
AU - Lim, Sung Hwan
AU - Kim, Jong Guk
AU - Choo, Yeon Sik
N1 - Publisher Copyright:
© 2016 The Ecological Society of Korea. All rights are reserved.
PY - 2016/2
Y1 - 2016/2
N2 - This study was to investigate the effect of salt stress on physiological characteristics such as plant growth, photosynthesis, solutes related to osmoregulation of Beta vulgaris. A significant increase of dry weight was observed in 50 mM and 100 mM NaCl. The contents of Chl a, b and carotenoid were lower in NaCl treatments than the control. On 14 day after NaCl treatment, photosynthetic rate (PN), the transpiration rate (E) and stomatal conductance of CO2 (gs) were reduced by NaCl treatment. On 28 day after NaCl treatment, the significant reduction in gs and E was shown in NaCl 200 mM. However, PN and water use efficiency (WUE) in all NaCl treatments showed higher value than that of control. Total ion contents (TIC) and osmolality were higher than the control. On 14 day after treatment, the contents of proline (Pro) increased significantly in 200 mM and 300 mM NaCl concentration compared with control, whereas on 28 day in all treatments it was lower than that of the control. The contents of glycine betaine (GB) increased with the increase of NaCl concentration. The contents of Na+, Cl-, GB, osmolality and TIC increased with the increase of NaCl concentrations. These results suggested that under severe NaCl stress conditions, NaCl treatment did not induce photochemical inhibition on fluorescence in the leaves of B. vulgaris, but the reduction of chlorophyll contents was related in a decrease in leaf production. Furthermore, increased GB as well as Na+ and Cl- contents resulted in a increase of osmolality, which can help to overcome NaCl stress.
AB - This study was to investigate the effect of salt stress on physiological characteristics such as plant growth, photosynthesis, solutes related to osmoregulation of Beta vulgaris. A significant increase of dry weight was observed in 50 mM and 100 mM NaCl. The contents of Chl a, b and carotenoid were lower in NaCl treatments than the control. On 14 day after NaCl treatment, photosynthetic rate (PN), the transpiration rate (E) and stomatal conductance of CO2 (gs) were reduced by NaCl treatment. On 28 day after NaCl treatment, the significant reduction in gs and E was shown in NaCl 200 mM. However, PN and water use efficiency (WUE) in all NaCl treatments showed higher value than that of control. Total ion contents (TIC) and osmolality were higher than the control. On 14 day after treatment, the contents of proline (Pro) increased significantly in 200 mM and 300 mM NaCl concentration compared with control, whereas on 28 day in all treatments it was lower than that of the control. The contents of glycine betaine (GB) increased with the increase of NaCl concentration. The contents of Na+, Cl-, GB, osmolality and TIC increased with the increase of NaCl concentrations. These results suggested that under severe NaCl stress conditions, NaCl treatment did not induce photochemical inhibition on fluorescence in the leaves of B. vulgaris, but the reduction of chlorophyll contents was related in a decrease in leaf production. Furthermore, increased GB as well as Na+ and Cl- contents resulted in a increase of osmolality, which can help to overcome NaCl stress.
KW - Chlorophyll fluorescence
KW - Osmotic regulation
KW - Photosynthesis
KW - Proline
KW - Salt stress
UR - http://www.scopus.com/inward/record.url?scp=84999018461&partnerID=8YFLogxK
U2 - 10.5141/ecoenv.2016.009
DO - 10.5141/ecoenv.2016.009
M3 - Article
AN - SCOPUS:84999018461
SN - 2287-8327
VL - 39
SP - 81
EP - 90
JO - Journal of Ecology and Environment
JF - Journal of Ecology and Environment
IS - 1
ER -