Over-expressing FBL1 Receptor Led to Root Formation and Growth of Populus alba x P. glandulosa cl. '84K'

• Published in: Forest research (Beijing) Vol. 28; no. 6
• Main Authors: Shu, Wen-bo, Zhao, Shu-tang, Zhang, Jing-jing, Zhou, Yi-hua, Lu, Meng-zhu
• Format: Journal Article
• Language: Chinese
• Published: 01.01.2015
• Subjects: Populus alba
• ISSN: 1001-1498

Poplar is one of the major fast-growing tree species in China,but little was known about the effect of auxin on fast growth and secondary growth of poplar plants. In this study,Ptr FBL1 for auxin receptor gene was cloned in poplar,the over-expression vector of PMDC32-Ptr FBL1 based on PMDC32 was constructed and 17 Ptr FBL1 overexpressed plants of P. alba x P. glandulosa cl. '84K'were obtained. The root,growth and photosynthetic indexes of 3 transgenic lines and the control were analyzed. The results showed that the total root length and total root area of transgenic lines were higher than those of the non-transgenic control lines,and the differences were all significant or extremely significant. On the other hand,the mean adventitious root length,mean adventitious root diameter and root biomass were not significant. The plant height,average internode length,average internode diameter and ratio of height and diameter were higher than these of the control lines. In addition to lower limitation of stoma( Ls),all