Effects of gibberellin A_(4/7), 6-benzylaminopurine and chlormequat chloride on the number of male and female strobili and immature cones in Chinese Pine (Pinus tabuliformis) with foliar sprays

作     者：ZHAO Peng Keith E. Woeste ZHANG Shuo-xin YANG Peihua FAN Jun-feng HUANG Zhong-lian MA Zhen-hua 

作者机构：College of Forestry Northwest A＆F University Yangling Shaanxi 712100 P. R. China USDA Forest Service Hardwood Tree Improvement and Re-generation Center Department of Forestry and Natural Resources PurdueUniversity 715 West State Street West Lafayette IN 47907 USA. QinlingNational Forest Ecosystem Research Station Ningshan Shaanxi 711600 P. R. China Donald Danforth Plant Science Center St. Louis MO 63132 USA Northwest Forestry Exploring Institute of China State Forestry Administra-tion Xi＇an Shaanxi 710048 P. R. China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2011年第22卷第3期

页      面：353-359页

核心收录：

学科分类：090403[农学-农药学(可授农学、理学学位）] 09[农学] 0904[农学-植物保护] 0901[农学-作物学] 

基　　金：Partial funding for this research was provided by The State Forestry Administration of China(No.2006-85) 

主　　题：flower promotion conifer seed production breeding Pinus tabuliformis Carr. 

摘      要：Three kinds of plant growth regulators, gibberellinA 4/7 （GA 4/7 ）, 6-benzylaminopurine （BA）, and chlormequat chloride （CCC）, were evaluated for their ability to promote strobilus and cone production in a Chinese pine （Pinus tabuliformis Carr.） clonal seed orchard. Treatments （0, 250, 500, or 1000 mg L -1 ） were applied during three periods （June- July, July-August and August-September） in 2005. Of the three plant growth regulators, GA 4/7 was the best for promoting flower and cone production. Trees sprayed with GA 4/7 （500 mg L -1 ） from June to September had significantly more female strobili and immature cones than controls and other treatments （p≤0.0001）. The best time to apply GA 4/7 was in June. BA at 500 mg L -1 significantly increased female flower and immature cone production, compared to other treatments and controls （p≤0.0001）, while promotion of male strobili was unchanged. Chlormequat chloride at 1000 mg L -1 significantly increased the number of male strobili, compared to the other treatments （p≤0.0001）. Spraying CCC at500 mg L -1 significantly increased the number of female strobili, compared to controls （p0.05）, but it had no effect on immature cone production （p0.05）. These results are important for improving seed production and seed orchard management of Chinese pine.