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园艺学报 ›› 2026, Vol. 53 ›› Issue (9): 2679-2692.doi: 10.16420/j.issn.0513-353x.2025-0749

• 栽培 · 生理生化 • 上一篇    下一篇

矮壮素对苹果幼苗生长、光合特性及碳氮代谢的影响

王红果1, 张秀英2, 刘照霞3, 刘晶泉1, 吕梦雪1, 张瑞瑞1, 姜翰1, 朱占玲1,*(), 葛顺峰1,*(), 姜远茂1,*()   

  1. 1 山东农业大学园艺科学与工程学院, 山东省苹果技术创新中心,山东省果蔬优质高效生产协同创新中心, 山东泰安 271018
    2 昭通市苹果产业发展中心, 云南昭通 657000
    3 山东农业大学科教站园管理中心, 山东泰安 271018
  • 收稿日期:2026-03-25 修回日期:2026-05-07 出版日期:2026-09-20 发布日期:2026-09-20
  • 通讯作者:
    *E-mail:,
  • 基金资助:
    山东省重点研发计划项目(2024CXGC010903); 国家重点研发计划项目(2023YFD2301000); 现代农业产业技术体系建设专项资助(CARS-27); 山东省自然科学基金项目(ZR2021MC093)

Effects of Chlormequat Chloride on Growth,Photosynthetic Characteristics and Carbon and Nitrogen Metabolism of Apple Plants

WANG Hongguo1, ZHANG Xiuying2, LIU Zhaoxia3, LIU Jingquan1, LÜ Mengxue1, ZHANG Ruirui1, JIANG Han1, ZHU Zhanling1,*(), GE Shunfeng1,*(), JIANG Yuanmao1,*()   

  1. 1 College of Horticulture Science and Engineering, Shandong Agricultural University,Apple Technology Innovation Center of Shandong Province,Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production of Shandong Province,Tai’an, Shandong 271018, China
    2 Apple Industry Development Center of Zhaotong, Zhaotong, Yunnan 657000, China
    3 Science and Education Base Management Center, Shandong Agricultural University,Tai’an, Shandong 271018, China

摘要:

为探明矮壮素(chlormequat chloride,CCC)对苹果砧木生长及碳氮代谢的调控机制,以一年生苹果矮化砧木G935幼苗为试材,采用15N和13C同位素标记技术,水培条件下研究不同浓度矮壮素(0、150、300、450、600 mg · L-1)对苹果幼苗生长、光合作用、15N吸收、13C分配以及碳氮代谢相关酶活性的影响。结果表明:与清水对照相比,喷施矮壮素使苹果幼苗株高、叶面积和地上部生物量分别降低了14.43% ~ 38.20%、1.29% ~ 18.9%和2.52% ~ 13.16%,茎粗、根系长度、地下部生物量和根冠比分别增加了9.55% ~ 38.22%、4.59% ~ 12.80%、8.47% ~ 55.08%和6.67% ~ 73.33%。叶片净光合速率(Pn )随着矮壮素浓度呈先升高后降低的趋势,在300 mg · L-1处理时达到最高值,比对照提高了22.02%。叶片蔗糖合成酶、蔗糖磷酸合成酶、硝酸还原酶、谷氨酸合成酶、谷氨酰胺合成酶活性均随矮壮素浓度呈现先升高后降低的趋势,且都在300 mg · L-1处理时最高。此外,300 mg · L-1处理增加了全株13C和15N的积累量并提高了13C和15N在根系中的分配。相较于对照,300 mg · L-1处理下叶片碳氮比和植株15N利用效率分别提高了3.80%和45.31%。综上,300 mg · L-1矮壮素可以增强叶片光合速率,提高碳氮代谢酶活性,促进15N、13C的吸收利用,优化碳氮分配,从而促进根系生长,提高植株根冠比和碳氮比。

关键词: 苹果, 矮壮素, 15N, 13C, 碳氮比, 光合特性

Abstract:

To elucidate the mechanism of chlormequat chloride(CCC)in regulating the growth and carbon-nitrogen metabolism of apple rootstocks,the effects of different CCC concentrations(0,150,300,450,and 600 mg · L-1)on seedling growth,photosynthesis,15N uptake,13C distribution,and key enzyme activities related to carbon and nitrogen metabolism of one-year-old dwarfing apple rootstock G935 were investigated in a hydroponic experiment by applying 15N and 13C isotope labeling techniques. The results showed that,compared with the control,CCC application reduced plant height,leaf area,and aboveground biomass by 14.43%-38.20%,1.29%-18.90%,and 2.52%-13.16%,respectively,while it increased stem diameter,root length,belowground biomass,and root-to-shoot ratio by 9.55%-38.22%,4.59%-12.80%,8.47%-55.08%,and 6.67%-73.33%,respectively. Leaf net photosynthetic rate(Pn) exhibited an initial increase followed by a decrease with increasing CCC concentration,reaching its maximum under 300 mg · L-1 treatment,which was 22.02% higher than that of the control. The activities of key enzymes,including sucrose synthase,sucrose phosphate synthase,nitrate reductase,glutamate synthase,and glutamine synthetase,all followed a similar trend-increasing initially and then declining-with the highest levels observed under 300 mg · L-1 treatment. Furthermore,300 mg · L-1 treatment enhanced the accumulation of both 13C and 15N in the whole plant and increased their allocation to the root system. Compared with the control,the leaf C/N ratio and 15N use efficiency under 300 mg · L-1 treatment increased by 3.80% and 45.31%,respectively. In conclusion,the application of 300 mg · L-1 CCC improved photosynthetic capacity,enhanced carbon and nitrogen metabolic enzyme activities,promoted the uptake and utilization of 15N and 13C,and optimized the allocation of carbon and nitrogen,thereby facilitating root growth and increasing the root-to-shoot ratio and C/N ratio in apple plants.

Key words: apple, chlormequat chloride, 15N, 13C, carbon-nitrogen ratio, photosynthetic capacity

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