Chinese Bulletin of Botany ›› 2012, Vol. 47 ›› Issue (2): 133-140.DOI: 10.3724/SP.J.1259.2012.00133

Previous Articles     Next Articles

Morphological and Anatomical Features of Root Sucker Propagation of Populus pruinosa

Zhijun Li1,2,3*, Peipei Jiao1, Zhengli Zhou1,2, Qian Li3, Jianqiang Li3*   

  1. 1Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Xinjiang Production & Construction Corps, Alar 843300, China;

    2College of Plant Science, Tarim University, Alar 843300, China;

    3College of Agriculture and Bio-technology, China Agricultural University, Beijing 100193, China
  • Received:2011-03-08 Revised:2011-07-29 Online:2012-03-01 Published:2012-03-16
  • Contact: Zhijun Li,Jianqiang Li
  • Supported by:

    ;National Program on Key Basic Research Project;Foundation for Xinjiang Production &Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin

Abstract: We studied the morpho-anatomic characteristics of the clonal growth of root suckers of Populus pruinosa by the conventional paraffin method. Transverse lateral roots were formed by periderm, secondary vascular tissue, and the tetrarch’s primary xylem, with developed vascular rays and secondary elongated parenchyma in secondary vascular tissues. The clonal growth of root suckers of P. pruinosa is based on the development and growth of adventitious buds on transverse lateral roots. Adventitious buds originated from cork cambium of transverse lateral roots and expressed the time characteristics of synchronous and asynchronous generation and the spatial characteristics of single-point and multi-point gathered generation. The cork cambium cells formed primordia of adventitious buds by cell division. The cell division, proliferation, and differentiation of adventitious primordia formed visible primordia on the surface of transverse lateral roots and directly developed as root suckers. The features of adventitious bud development, distribution, and growth were the key reason for root suckers to keep growing to different sizes and form a densely fasciculate shape. P. pruinosa has good ability for clonal growth of root suckers.