J Integr Plant Biol. ›› 1994, Vol. 36 ›› Issue (10): -.

• Research Articles •    

Comparative Anatomy of Secondary Phloem in Celastraceae

Qi Wen-qing and Gao Xin-zeng   

Abstract: A comparative anatomical study on the secondary phloem of 5-genera, 10 species in Celastraceae was carried out. Based on the phloem structure characters, 3 phloem types were observed. In type Ⅰ , as seen in 5 species of Euonymus, the sieve-tube elements have more inclined end walls and numerous sieve areas (compound sieve plates), phloem rays are almost uniseriate. Type Ⅱ is seen in Celastrus and Tripterygium. It has relatively short sievetube elements, slight inclined end wall and sparse number of sieve areas: the phloem fiber is not lignified and ray is multiseriate. Type Ⅲ is observed in Dipentodon and Perrottetia, the sieve-tube elements are with simple sieve plate, the end wall is almost transverse, there are sclereid and fiber groups in the nonfounctional phloem, and phloem rays are uniseriate or biseriate.

Key words: Celastraceae, Secondary phloem

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2021 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22