Changes of ABA contents in Mango during floral differentiation after heading-back.
Peng Lei, Gao XiaoJun, Long WenHong, Wu XingEn, Zhou Ling, Dong GuangPing, Wan Ying
Author Affiliation: College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, China.
Journal of Yunnan Agricultural University 26 : 434-436
Abstract : The phenomenon that floral buds in Mango could still differentiate even if the flower brands were headed back in the same year. The flowering of bearing basal shoot was headed back on February 15, 2009 and then 5 days were done as so that. Abscisic acid (ABA) contents in buds, leaves and phloem were detected during floral bud differentiation. The result showed that: ABA contents in buds and leaves reached the maximum (38 262.09 and 53 223.52 ng/gFW, respectively) on February 25, while ABA content in phloem reached the peak (28 222.12 ng/gFW) on March 2. ABA contents in buds, leaves and phloem decreased to the lowest (9 246.25, 23 463.89 and 17 865.34 ng/gFW, respectively) on March 7. During floral bud differentiation, the average contents of buds, leaves and phloem were 17 170.83, 33 525.89 and 18 528.08 ng/gFW, respectively. ABA contents in buds phloem and leaves of the control plant reached the maximum (37 764.10, 32 910.73 and 24 419.30 ng/gFW, respectively) on March 2, and decreased to the lowest (7 367.98, 21 567.21 and 16 523.16 ng/gFW, respectively) on March 7, the average contents were 14 636.96, 29 810.72 and 16 623.48 ng/gFW.