摘要
以山西省阳曲县15年生的红嘎拉/八棱海棠和晋富4号/八棱海棠为对照,红嘎拉/SC1/八棱海棠和晋富4号/SC1/八棱海棠为处理,研究矮化中间砧SC1对苹果叶片光合调控特性及果实品质的影响。结果表明:SC1矮化中间砧显著上调了叶片的光能捕获效率F_(v)′/F_(m)′、吸收光能用于光化学电子传递的分配比例q_(P)、量子效率Φ_(CO2)以及光系统Ⅱ的实际光化学量子效率Φ_(PSII),同时显著下调了吸收光能用于热耗散的分配比例q_(N);叶片最大净光合速率P_(nmax,P)、可利用光强范围I_u和磷酸丙糖供给速率V_(tpu)显著提高,而光合叶肉限制L_(M)、光下暗呼吸的CO_(2)补偿点Γ^(*)以及米氏常数K_(c)和K_(o)显著降低;SC1显著提高了果皮的着色面积和红度值,红嘎拉提高了13.7%和43.2%,晋富4号提高了42.5%和37.6%;SC1使红嘎拉和晋富4号的果肉可溶性固形物含量分别由无中间砧对照的14.1%和14.9%提高到15.2%和15.9%,果皮总酚含量提高了72.2%(红嘎拉)和66.9%(晋富4号),果肉总酚含量提高了84.4%(红嘎拉)和45.4%(晋富4号)。综上,SC1矮化中间砧通过提高叶片对光能的捕获和利用效率以及光能分配于电子传递的比例,降低光合叶肉限制,促进叶片生化反应,从而提高叶片的光合速率和光合能力,提升果实品质。
The current study aims to investigate the influences of dwarfing intermediate stock SC1 on apple photosynthetic regulation characteristics and fruit quality.By using 15-year-old ‘Honggala’and ‘Jinfu 4’grafted on Malus robusta rootstock(BLHT)(as two controls)and SC1 grafted on controls(as two treatments)as materials,the fluorescence quenching dynamics,the responses of leaf net photosynthetic rate(P_n)to photosynthetically active radiation(PAR)and leaf P_n to intercellular CO_(2) concentration(C_i)as well as fruit quality indices of ‘Honggala’and ‘Jinfu 4’were measured and compared.Results showed that,in comparison with Honggala/BLHT and Jinfu 4/BLHT,the application of SC1improved the capture efficiency of light energy(F_(v)′/F_(m)′),photochemical quenching coefficient(q_(P)),quantum efficiency(Φ_(CO_(2)))and actual PSⅡefficiency under irradiance(Φ_(PSII))of both the two scion cultivars.Meanwhile,the SC1 application suppressed the non-photochemical quenching coefficient(q_(N))in Honggala and Jinfu 4.The leaf maximum net photosynthetic rate(P_(nmax,P)),light utilization range(I_u)and supplying rate of triose phosphate(V_(tpu))of Honggala/SC1/BLHT and Jinfu 4/SC1/BLHT were also found to be significantly higher than those of Honggala/BLHT and Jinfu 4/BLHT.Besides,photosynthetic mesophyll limitations(L_(M)),CO_(2) compensation point of dark respiration under light(Γ^(*))and Michaelis constant of Rubisco to CO_(2)(K_(c))and to O_(2)(K_(o))were decreased significantly in Honggala/SC1/BLHT and Jinfu 4/SC1/BLHT than in Honggala/BLHT and Jinfu 4/BLHT.The application of SC1 also influenced greatly the fruit quality indices of Honggala and Jinfu 4.The coloring area and value of red chromaticity in peel were increased significantly in Honggala/SC1/BLHT than in Honggala/BLHT(by 13.7%and 43.2%)and in Jinfu 4/SC1/BLHT than in Jinfu 4/BLHT(by 42.5%and 37.6%).The soluble solids content in flesh(increased from 14.1%to 15.2%in Honggala and from 14.9%to 15.9%in Jinfu 4)and total phenolic compounds content in p
作者
林琭
蔚露
谢鹏
李志强
王红宁
赵国平
牛自勉
LIN Lu;YU Lu;XIE Peng;LI Zhiqiang;WANG Hongning;ZHAO Guoping;NIU Zimian(College of Horticulture,Shanxi Agricultural University,Taiyuan 030031,China;Institute of Pomology,Shanxi Agricultural University,Taiyuan 030031,China;Dengjiaping Agricultural Demonstration Garden in Yangqu County,Taiyuan 030100,China)
出处
《园艺学报》
CAS
CSCD
北大核心
2024年第12期2871-2885,共15页
Acta Horticulturae Sinica
基金
山西省科技成果转化引导专项(202104021301048)
山西省基础研究计划项目(自然科学研究面上项目,202203021221163)
山西农业大学横向科技项目(2022HX055,2022HX103,2023QT105)
山西农业大学园艺学院项目(2022YYXY-PX-1)。
关键词
苹果
矮化中间砧
光合调控
叶肉限制
果实品质
apple
dwarfing intermediate stock
photosynthetic regulation
mesophyll limitation
fruit quality
