Studies on Floral Organ Development Process of Precocious Walnut （Juglans regia） by Anatomia

ACTA HORTICULTURAE SINICA ›› 2011, Vol. 38 ›› Issue (3): 434-440.

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Studies on Floral Organ Development Process of Precocious Walnut （Juglans regia） by Anatomia

LI Yong-tao 1,2，ZHAO Yong-gang 1,2，YANG Ke-qiang 1,2,3,* ，FANG Yao-yao 1,2，and HOU Li-qun 4

（¹ Forestry College of Shandong Agricultural University，Tai’an，Shandong 271018，China；²Key Laboratory of Agricultural Ecology and Environment of Shandong Agricultrual University，Tai’an，Shandong 271018，China；3 State Key Laboratory of Crop Biology，Tai’an，Shandong 271018，China；4Shandong Academy of Forestry，Ji’nan 250014，China）

Received:2010-06-23 Revised:2011-02-21 Online:2011-03-25 Published:2011-03-25
Contact: YANG Ke-qiang

Abstract

Abstract: Anatomic characteristics of the floral differentiation were compared between two walnut （Juglans regia L.）cultivars，precocious‘Xiangling’ and late maturing‘Qinglin’，during their first florescence. The results showed that female floral bud of ’Xiangling’ started critical stage of differentiation in early/middle of May in Tai’an，Shandong Province. Sequent phases consisted of stage of female floral inflorescence differentiation，stage of stalk and female floral primordium differentiation，stage of differentiation of bract primordium，the female flower calyx，petal，pistil and ovule primordium. For ‘Xiangling’，female floral primordium was occasionally observed advancing toward petal primordium and pistil primordium，which would abort later although. However，this extraordinary progress did not occur in‘Qinglin’. The results also revealed that male floral bud of‘Xiangling’began the differentiation in early/middle of April and then progressed towards the inflorescence differentiation of male flowers，differentiation of calyx primordium，stamen and anthers primordium，formation of pollen sacs and pollenin time of occurrence.

Key words: walnut, Juglans regia, female floral, male floral, bud differentiation, floral organ, abortion

CLC Number:

S 664.1

LI Yong-tao;ZHAO Yong-gang;YANG Ke-qiang;;;FANG Yao-yao;and HOU Li-qun . Studies on Floral Organ Development Process of Precocious Walnut （Juglans regia） by Anatomia[J]. ACTA HORTICULTURAE SINICA, 2011, 38(3): 434-440.

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Studies on Floral Organ Development Process of Precocious Walnut （Juglans regia） by Anatomia

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