J Integr Plant Biol. ›› 1993, Vol. 35 ›› Issue (9): -.

• Research Articles •    

Soybean Seedling Extracts Inhibit Supernodulation

Zhu Yu-xian,Pan Nai-sui and Chen Zhang liang   

Abstract: When soybean (Glycine max ) nodulation mutant nts 382 was inoculated with Bradyrhizobium japonicum, these plants nodulated significantly more than the parental type Bragg. Nts 382 seedlings displayed wild-type nodulation pattern when aqueous extracts of young Bragg shoots were applied to the cultural medium together with nutrient solution. Application of young nts 382 shoot extracts to Bragg seedlings did not result in any apparent increase in nodule number. In graft experiments, young shoots from mutant nts 382 induced supernodulation on Bragg root stocks, while no supernodulation was observed when Bragg seedlings were used as scion and grafted onto nts 382 root stocks. Further, the effectiveness of Bragg plant extracts to suppress supernodulation on nts 382 seedlings was found to depend on the age of the plant material used, being very ineffective with extracts from 60-day-old plants. The age effect was not observed in graft experiments. These findings suggest that soybean supernodulation phenomenon may be controlled by one or a few unknown chemicals or plant hormones.

Key words: Symbiotic nitrogen fixation, Supernodulation, Soybean

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 © 2022 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