J Integr Plant Biol. ›› 1984, Vol. 26 ›› Issue (6): -.

• Research Articles •    

Pathways of Androgenesis and Observations on Cultured Pollen Grains in Rice (Oryza saliva Subsp. Keng)

Qu Rong-da and Chen Ying   

Abstract: (1) Pathways A-V, A-G, A-GV, and B existed in androgenesis of rice. Usually B pathway was predominant. Degeneration could happen on androgenic grains via each pathway during the early stage of androgenesis. (2) Statistics suggested that the multinucleate grains might be converted to multicellular grains by a later formation of cell walls and were consequently one of the sources of callus. (3) Androgenic grains was usually of medium size (35–40 μm) with dense protoplasm. In isolated pollen culture, the diameter of androgenic grains increased 2.5–5μm per day. Before the breakdown of exine, the cell walls seemed to be thickened and the grains would contract abruptly. (4) Small, slowly-moving starch granules were usually contained within multicellular grains cultured isolately. They were speculated to participate actively in the metabolism of androgenic grains.

Key words: Androgenic pathway, Pollen culture, Observation invitro, Rice

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