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园艺学报 ›› 2026, Vol. 53 ›› Issue (1): 65-81.doi: 10.16420/j.issn.0513-353x.2025-0039

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

GA3诱导葡萄无核形成的胚胎学及生理生化研究

包敏1, 田亚平1, 李凡1, 魏茜茜1, 刘苗苗1, HASSAN Jawad1, 李智1,2, 赵一洁1,2, 高敏1,2, 王西平1,2,*()   

  1. 1 西北农林科技大学园艺学院作物抗逆与高效生产全国重点实验室,农业农村部西北园艺作物生物学与种质创制重点实验室, 陕西杨凌 712100
    2 旱区农业新疆研究院, 乌鲁木齐 830091
  • 收稿日期:2025-03-20 修回日期:2025-11-19 出版日期:2026-01-25 发布日期:2026-01-26
  • 通讯作者:
  • 基金资助:
    旱区农业新疆研究院农业科技创新专项(XJHQNY-2025-7); 国家自然科学基金—联合基金重点项目(U1603234); 西安市农业重点产业链关键技术攻关项目(24NYGG0009); 咸阳市农业重大技术攻关项目(L2024-ZDKJ-ZDGG-NY-0016)

Embryological,Physiological and Biochemical Mechanisms Underlying GA3-Induced Seedlessness in Grapes

BAO Min1, TIAN Yaping1, LI Fan1, WEI Xixi1, LIU Miaomiao1, HASSAN Jawad1, LI Zhi1,2, ZHAO Yijie1,2, GAO Min1,2, WANG Xiping1,2,*()   

  1. 1 State Key Laboratory of Crop Stress Resistance and High-Efficiency ProductionKey Laboratory of Biology and Genetic Improvement of Horticultural Crops(Northwest Region),Ministry of Agriculture and Rural Affairs,College of Horticulture,Northwest A & F University,Yangling, Shaanxi 712100, China
    2 Xinjiang Research Institute of Agriculture in Arid Areas, Urumqi 830091, China
  • Received:2025-03-20 Revised:2025-11-19 Published:2026-01-25 Online:2026-01-26

摘要:

以‘户太8号’和‘红地球’葡萄为试材,设置GA3、PAC(GA3抑制剂)及GA3 + PAC三种处理,结合果实与种子形态学观察、胚珠组织学观察、抗氧化酶活性检测及多胺与内源激素含量测定等方法,解析GA3诱导葡萄无核化的胚胎学及生理生化机制。结果显示,GA3处理后‘户太8号’和‘红地球’无核率和坐果率均显著提升,且果形指数均显著高于对照及其他处理,而PAC处理后果形指数低于对照;GA3处理可诱导胚囊与胚乳核败育,且‘户太8号’完全败育时间(13 d)早于‘红地球’(15 d)。GA3处理促进过氧化氢(H2O2)生成与丙二醛(MDA)积累,降低超氧化物歧化酶(SOD)和过氧化物酶(POD)活性,表明GA3通过调控氧化应激水平诱导胚囊败育;GA3对两个品种中腐胺(Put)、亚精胺(Spd)及精胺(Spm)的差异化影响,使(Spd + Spm)/Put比值低于对照,该比值降低可能参与无核形成的代谢调控;GA3处理促进内源GA3、生长素(IAA)及脱落酸(ABA)合成(‘红地球’IAA呈先抑制后促进),处理初期(IAA + GA3)/ABA比值高于对照,为无核发育构建了适宜激素环境,后续随GA3自然代谢回落,该比值同步降低。以上研究阐明,GA3通过协同调控胚胎败育、氧化应激、多胺及激素平衡诱导葡萄无核形成。

关键词: 葡萄, 赤霉素, 无核化, 胚珠, 抗氧化活性, 内源激素

Abstract:

To clarify the underlying mechanisms of gibberellin(GA3)-induced seedlessness in grape,Vitis labrusca‘Hutai 8’and V. vinifera‘Red Globe’were subjected to three treatments:GA3,PAC(the GA3 inhibitor),and GA3 + PAC. By integrating fruit and seed morphological observations,ovule histological analyses,antioxidant enzyme activity measurements,and determinations of polyamine and endogenous hormone contents,the embryological,physiological,and biochemical mechanisms of GA3- induced grape seedlessness were elucidated. GA3 treatment significantly increased both the seedlessness rate and fruit set in the two cultivars. The fruit shape index was also markedly higher than that of the control and other treatments,whereas PAC reduced it below the control level. GA3 induced embryo sac and endosperm nucleus abortion,with abortion occurring earlier in‘Hutai 8’(13 d)than in‘Red Globe’(15 d). Moreover,GA3 promoted the accumulation of hydrogen peroxide(H2O2)and malondialdehyde (MDA),while decreasing the activities of superoxide dismutase(SOD)and peroxidase(POD)in both cultivars,indicating that GA3 induces embryo sac abortion by regulating oxidative stress levels. GA3 treatment differentially affected putrescine(Put),spermidine(Spd),and spermine(Spm),resulting in a decreased(Spd + Spm)/Put ratio relative to the control;this reduction may contribute to the metabolic regulation of seedlessness formation. GA3 treatment promoted the synthesis of endogenous GA3,indole-3-acetic acid(IAA),and abscisic acid(ABA)in both cultivars,although IAA in‘Red Globe’showed an initial decline followed by an increase. At the early stage,the(IAA + GA3)/ABA ratio was higher than that of the control,and as exogenous GA3 declined through natural metabolism,this ratio decreased accordingly. Overall,this study reveals that GA3 induces grape seedlessness by coordinately regulation of embryo abortion,oxidative stress,polyamines,and hormone balance.

Key words: grape, gibberellin, seedlessness, ovule, antioxidant activity, endogenous hormone