Plant dry weight and changes in Na+ and K+ contents in leaves were investigated in 1-year-old cuttings from the receptor poplar 107 (Populus × euramericana ‘Neva’) and transgenic poplar 18-1 after cuttings were cultured in Hoagland solution with different NaCl concentrations. The growth and rooted percentage of 18-1 was higher than that of 107 with 0.6%NaCl, and the accumulation of Na+ in 18-1 leaves was about 1.45 times higher than that in 107. Physiological characteristics in leaf sections from 107 and 18-1 under NaCl stress were determined. Leaf sections from 18-1 displayed lower chlorophyll decreasing speed and relative electrical conductivity than that from 107. When sections of young poplar leaves were plated on MS medium with 1.2%NaCl, leaf sections from 107 stopped growing, but those from 18-1 grew continuously and their length increased nearly 50% after 7 days. Thus, salt tolerance between different genotypes can be identified in leaf sections.
Ying Zhang, Yingxia Yang, Yanhong Jia, Xiangming Zhou, Lili Nie, Yue Zhang, Shouyi Chen, Jingan Wang, Zhongqi Liu
. Using Leaf Sections to Identify Different Salt Tolerance Potential of Poplar Plants[J]. Chinese Bulletin of Botany, 2011
, 46(3)
: 302
-310
.
DOI: 10.3724/SP.J.1259.2011.00302
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