Abstract： Taking multi-branch watermelon variety ‘Longkang No.9’ and no branch watermelon variety
‘Wuchazao’ as experimental materials，this paper studied and analyzed the changes of endogenous hormone
content，including Indole-2-carboxylic acid（ICA），indole-3-acetic acid（IAA），zeatin（Z），dihydrozeatin
（DHZ），abscisic acid（ABA），gibberellin（GA1，GA3，GA4 and GA7） by HPLC-MS/MS during
watermelon growth period．The results showed that the contents of ICA，ICA+IAA in watermelon leaves of no
branch variety were significantly higher than that of multi-branch variety during vine spreading period and fruitexpanding
early stage．During the whole growth period，the contents of Z，DHZ+Z in no branch variety were
lower than that of multi-branch variety．Furthermore，the ratios of （ICA+IAA）/（Z+DHZ），（ICA+IAA）/
ABA，（ICA+IAA）/（GA1+GA3+GA4+GA7） in no branch variety were significantly higher than that of multibranch
variety during vine spreading period and early stage of fruit expanding．Thus，it could be seen that
higher contents of ICA could inhibit the branching of watermelon side shoots；while the higher content of DHZ
and Z could promote the form of watermelon lateral branches．The higher ratios of（ ICA+IAA）/（Z+DHZ），
（ICA+IAA）/ABA，（ICA+IAA）/（GA1+GA3+GA4+GA7） were harmful to the formation of water melon
branches．
杨永岗 张化生 李晓芳 苏永全. 不同分枝西瓜品种生长过程中内源激素含量的变化[J]. 中国蔬菜, 2020, 1(10): 48-54.
YANG Yong-gang，ZHANG Hua-sheng，LI Xiao-fang，SU Yong-quan. Changes of Endogenous Hormone Content in Watermelon Varieties with Different Branching Forms During Their Growth Process. China Vegetables, 2020, 1(10): 48-54.
