Articles
DIFFERENCES IN CALCIUM UPTAKE AND ACCUMULATION BY CHINESE CABBAGE (BRASSICA CAMPESTRIS L. SSP. PEKINENSIS) CULTIVARS UNDER STRESS CONDITIONS
Article number
467_27
Pages
245 – 252
Language
Abstract
Uptake and translocation of Ca2+ by plant roots have been showed to be inhibited by osmotic stress.
To assess the different response of six Chinese cabbage cultivars, a hydroponics culture system was employed, using NaCl (EC at 5 and 10 mS/cm) and PEG (at -0.3Pa and -1.0Pa). Under salt and osmotic stresses, accumulation of Ca in all the tested cultivars declined significantly.
The most sensitive cultivar was Tianjingqingmaye, with a Ca content being 21.05% of the NaCl free control in 5 mS/cm NaCl solution and 6.32% in 10 mS/cm NaCl solution one day after treatment, respectively.
The most insensitive cultivar was Chengqing 2. with a Ca content being 66.70% of the control in 5 mS/cm NaCl solution one day after treatment, and 49.45% in 10 mS/cm solution respectively.
The latter cultivar contained 3 times and 8 times Ca of that in the former cultivar in 5 mS/cm and 10 mS/cm NaCl solution respectively.
In PEG treated plants, Tianjingqingmaye was most affected with a Ca content 80.15% lower than that of the zero PEG control in -0.3 Pa PEG solution and 94.68% lower than that of control in -1.0 Pa PEG. The least affected cultivar, Zhaoshou 5 has a Ca content only 27.50% lower than that of the control in -0.3 Pa PEG solution, and 45.78% lower than that of the control in -1.0 Pa PEG solution.
The difference between these two cultivars in Ca accumulation ability under osmotic stress was 2–3 times.
To assess the different response of six Chinese cabbage cultivars, a hydroponics culture system was employed, using NaCl (EC at 5 and 10 mS/cm) and PEG (at -0.3Pa and -1.0Pa). Under salt and osmotic stresses, accumulation of Ca in all the tested cultivars declined significantly.
The most sensitive cultivar was Tianjingqingmaye, with a Ca content being 21.05% of the NaCl free control in 5 mS/cm NaCl solution and 6.32% in 10 mS/cm NaCl solution one day after treatment, respectively.
The most insensitive cultivar was Chengqing 2. with a Ca content being 66.70% of the control in 5 mS/cm NaCl solution one day after treatment, and 49.45% in 10 mS/cm solution respectively.
The latter cultivar contained 3 times and 8 times Ca of that in the former cultivar in 5 mS/cm and 10 mS/cm NaCl solution respectively.
In PEG treated plants, Tianjingqingmaye was most affected with a Ca content 80.15% lower than that of the zero PEG control in -0.3 Pa PEG solution and 94.68% lower than that of control in -1.0 Pa PEG. The least affected cultivar, Zhaoshou 5 has a Ca content only 27.50% lower than that of the control in -0.3 Pa PEG solution, and 45.78% lower than that of the control in -1.0 Pa PEG solution.
The difference between these two cultivars in Ca accumulation ability under osmotic stress was 2–3 times.
Authors
M. Ying, C. Jiashu, Z. Guangwen
Keywords
Chinese cabbage, calcium uptake, calcium accumulation, salt stress, osmotic stress
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