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Journal of Integrative Agriculture  2016, Vol. 15 Issue (11): 2529-2538    DOI: 10.1016/S2095-3119(16)61341-2
Physiology·Biochemistry·Cultivation·Tillage Advanced Online Publication | Current Issue | Archive | Adv Search |
Impact of chilling accumulation and hydrogen cyanamide on floral organ development of sweet cherry in a warm region
WANG Lei1, ZHANG Lu1, 2, MA Chao1, XU Wen-ping1, LIU Zong-rang3, ZHANG Cai-xi1, Whiting D. Matthew2, WANG Shi-ping1
1 School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, P.R.China
2 Horticultural and Landscape Architecture Department, Washington State University, Washington 99164, USA
3 Appalachian Fruit Research Station, West Virginia 25430, USA
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Abstract        The microscopic investigation of the floral development of sweet cherry (Prunus avium L. cv. Hongdeng) from a warm winter climate (Shanghai) and cold winter climate (Tai’an, Shandong Province, China) was conducted to explore the reason of low fruit set. The effect of hydrogen cyanamide (HCN) on floral development under warm winter conditions was also investigated. Trees grown in Shanghai with insufficient chilling accumulation exhibited little difference in the progression of microspore development compared to trees in Tai’an that accumulated adequate chilling, but showed substantial delays in ovule and embryo sac development. The growth of nucelli did not proceed beyond the macrospore mother cell and macrospore stages with abortion rates of 13, 15 and 45% by 6, 3 and 0 d before full bloom, respectively. These abnormalities in the ovule and embryo sac in the Shanghai-grown trees were eliminated by HCN application. These results suggest that chilling regulates the development of female floral organs in winter dormancy; therefore, insufficient chilling accumulation, causing abnormality of the female floral organs, restricts the cultivation of sweet cherry in warm winter regions. Interestingly, HCN application, which decreased the chilling requirements for Hongdeng, may be a potential strategy for sweet cherry cultivation in warm winter regions.
Keywords:  chilling accumulation        hydrogen cyanamide        floral organ development        sweet cherry        warm winter region  
Received: 28 December 2015   Accepted:
Fund: 

This study was supported by grants from the 948 Project of the Ministry of Agriculture of China (2013-Z23) and the Shanghai Municipal Science Commission of China (10391900100).

Corresponding Authors:  ZHANG Cai-xi, Tel: +86-21-34205956, Fax: +86-21-34205961, E-mail: acaizh@sjtu.edu.cn; XU Wenping, E-mail: wp-xu@sjtu.edu.cn   
About author:  WANG Lei, E-mail: tianxingnudun@sjtu.edu.cn;

Cite this article: 

WANG Lei, ZHANG Lu, MA Chao, XU Wen-ping, LIU Zong-rang, ZHANG Cai-xi, Whiting D. Matthew, WANG Shi-ping. 2016. Impact of chilling accumulation and hydrogen cyanamide on floral organ development of sweet cherry in a warm region. Journal of Integrative Agriculture, 15(11): 2529-2538.

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