[Salt-alkaline tolerance of sorghum germplasm at seedling stage].
A sand culture experiment with Hoagland solution plus NaCl and Na2CO3 was conducted to study the responses of sorghum seedlings to salt-alkaline stress. An assessment method for identifying the salt-alkaline tolerance of sorghum at seedling stage was established, and the salt-alkaline tolerance of 66 sorghum genotypes was evaluated. At the salt concentrations 8.0-12.5 g x L(-1), there was a great difference in the salt-alkaline tolerance between tolerant genotype 'TS-185' and susceptive 'Tx-622B', suggesting that this range of salt concentrations was an appropriate one to evaluate the salt-alkaline tolerance of sorghum at seedling stage. At the salt concentrations 10.0 and 12.5 g x L(-1), there existed significant differences in the relative livability, relative fresh mass, and relative height among the 66 genotypes, indicating a great difference in the salt-alkaline tolerance among these genotypes. The genotype 'Sanchisan' was highly tolerant, 16 genotypes such as 'MN-2735' were tolerant, 32 genotypes such as 'EARLY HONEY' were mild tolerant, 16 genotypes such as 'Tx-622B' were susceptive, and genotype 'MN-4588' was highly susceptive to salt-alkaline stress. Most of the sorghum genotypes belonging to Sudangrasses possessed a high salt-alkaline tolerance, while the sorghum genotypes belonging to maintainer lines were in adverse.
Key Laboratory of Crop Genetics and Breeding, Department of Agronomy, Tianjin Agricultural College, Tianjin 300384, China. gao11799713@163.com
Jian-Ming
JM
Gao
Bu-Xian
BX
Xia
Qing-Hua
QH
Yuan
Feng
F
Luo
Yun
Y
Han
Zhi
Z
Gui
Zhong-You
ZY
Pei
Shou-Jun
SJ
Sun
D000222:Adaptation, Physiological; D055049:Salt Tolerance / Q000502:physiology*; D036226:Seedlings / Q000254:growth & development / Q000502:physiology*; D045868:Sorghum / Q000254:growth & development / Q000502:physiology*