干旱胁迫对转<i>PtPIP2;8</i>基因84K杨苗木光合、生长和根系结构的影响

干旱胁迫对转PtPIP2;8基因84K杨苗木光合、生长和根系结构的影响

刘丽燕, 冯锦霞, 刘文鑫, 万贤崇

Effects of drought stress on photosynthesis, growth and root structure of transgenic PtPIP2;8 poplar 84K (Populus alba × P. glandulosa)

LIU Li-Yan, FENG Jin-Xia, LIU Wen-Xin, WAN Xian-Chong

表3 干旱胁迫后84K杨转基因和野生型植株相对生长速率及生物量变化(平均值±标准偏差)

Table 3 Changes of relative growth rate and biomass of transgenic and wildtype poplar 84K after drought stress (mean ± SD)

株系 Line	基径 Basal diameter (%)	苗高 Height (%)	地上生物量 Aboveground biomass (%)	地下生物量 Belowground biomass (%)	根冠比 Root shoot ratio	叶面积 Leaf area (%)
抑制表达 RNAi-silence	97 ± 3^a	94 ± 3^a	93 ± 2^a	84 ± 5^a	0.5 ± 0.02^a	68 ± 4^a
野生型 Wildtype	92 ± 3^b	88 ± 4^b	86 ± 7^b	77 ± 4^b	0.4 ± 0.03^b	44 ± 2^b
超表达 Overexpression	92 ± 2^b	87 ± 4^b	77 ± 3^c	76 ± 5^b	0.3 ± 0.02^c	43 ± 2^b