[1]包星星,陈泽昊,丁鑫,等.低磷胁迫下不同砧木嫁接西瓜苗的生理响应与综合评价[J].江苏农业学报,2026,42(06):1251-1258.[doi:doi:10.3969/j.issn.1000-4440.2026.06.017]
　BAO Xingxing,CHEN Zehao,DING Xin,et al.Physiological responses and comprehensive evaluation of watermelon seedlings grafted onto different rootstocks under low phosphorus stress[J].,2026,42(06):1251-1258.[doi:doi:10.3969/j.issn.1000-4440.2026.06.017]
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低磷胁迫下不同砧木嫁接西瓜苗的生理响应与综合评价()

江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
42
期数:
2026年06期
页码:
1251-1258
栏目:
园艺
出版日期:
2026-06-30

文章信息/Info

Title:
Physiological responses and comprehensive evaluation of watermelon seedlings grafted onto different rootstocks under low phosphorus stress
作者:
包星星1; 陈泽昊1; 丁鑫1; 李再旭1; 乔少伟1; 丁明1; 2
(1.西北农林科技大学园艺学院,陕西杨凌712100；2.农业农村部西北设施园艺工程重点实验室,陕西杨凌712100)
Author(s):
BAO Xingxing1; CHEN Zehao1; DING Xin1; LI Zaixu1; QIAO Shaowei1; DING Ming1; 2
(1.College of Horticulture, Northwest A & F University, Yangling 712100, China；2.Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture and Rural Affairs, Yangling 712100, China)
关键词:
西瓜; 砧木; 耐低磷能力; 磷吸收利用; 综合评价
Keywords:
watermenlon; rootstock; low phosphorus tolerance; phosphorus absorption and utilization; comprehensive evaluation
分类号:
S651
DOI:
doi:10.3969/j.issn.1000-4440.2026.06.017
文献标志码:
A
摘要:
本研究以早佳8424西瓜为接穗,选用12份不同品种（系）西瓜砧木进行嫁接,设置低磷(0.01 mmol/L)处理与正常磷(0.50 mmol/L)处理,系统探究了低磷胁迫下不同砧木嫁接苗的生理响应机制。研究结果表明,低磷胁迫抑制嫁接苗生长,嫁接苗通过各种策略响应低磷胁迫。在光合作用方面,低磷胁迫会不同程度抑制各嫁接苗的光合能力,而耐低磷能力较强的砧西316砧木嫁接苗凭借较高的净光合速率和SPAD值,维持正常光合能力。在根系形态方面,低磷胁迫下,低磷胁迫导致主根显著伸长,且根干重变异系数最大,表明根系形态对低磷胁迫响应最为敏感。在磷素利用方面,大多数砧木嫁接苗低磷胁迫下植株磷积累量显著下降,但大多数砧木嫁接苗磷利用效率显著提高,表明嫁接苗通过提升磷利用能力适应低磷胁迫。基于主成分分析与隶属函数法构建综合评价体系,得出耐低磷能力评价值(D),其中京欣砧1号砧木嫁接苗D值最高(0.907),耐低磷能力最强；京欣砧4号砧木嫁接苗D值最低(0.212)，耐低磷能力最弱。聚类分析进一步将供试材料划分为三类,第一类群可归为耐低磷型,其综合耐低磷能力最强；第二类群为中间型,耐低磷能力中等；第三类群则可归为低磷敏感型,其综合耐低磷能力最弱。综上,本研究建立了多指标综合评价方法,筛选出京欣砧1号砧木嫁接苗与亲抗水瓜砧木嫁接苗等耐低磷砧木嫁接苗,并从光合作用维持、根系可塑性与磷高效利用等方面阐明了其适应机制,为西瓜耐低磷砧木选育与砧木嫁接苗栽培应用提供了理论依据与方法参考。
Abstract:
In this study, Zaojia 8424 watermelon was used as the scion, and 12 different varieties （lines） of watermelon rootstocks were selected for grafting. Two phosphorus levels were set, including low phosphorus (0.01 mmol/L) and normal phosphorus (0.50 mmol/L), to systematically explore the physiological response mechanisms of grafted seedlings with different rootstocks under low phosphorus stress. The results showed that low phosphorus stress inhibited the growth of grafted seedlings, and the grafted seedlings responded to low phosphorus stress through various strategies. In terms of photosynthesis, low phosphorus stress inhibited the photosynthetic capacity of all grafted seedlings to varying degrees, while the grafted seedlings of rootstock Zhenxi 316 with strong low-phosphorus tolerance maintained normal photosynthetic capacity due to its higher net photosynthetic rate and SPAD value. In terms of root morphology, low phosphorus stress significantly promoted the elongation of taproots, and the coefficient of variation of root dry weight was the largest, indicating that root morphology was the most sensitive to low phosphorus stress. In terms of phosphorus utilization, the phosphorus accumulation significantly decreased in most grafted seedlings under low phosphorus stress, but the phosphorus use efficiency increased significantly, indicating that grafted seedlings adapted to low phosphorus stress by improving phosphorus utilization capacity. A comprehensive evaluation system was constructed based on principal component analysis and membership function method, and the low-phosphorus tolerance evaluation value (D) was obtained. Among them, Jingxin Rootstock No.1 had the highest D value (0.907), indicating the strongest low-phosphorus tolerance, while Jingxin Rootstock No.4 had the lowest D value (0.212), indicating the weakest low-phosphorus tolerance. Cluster analysis further divided the tested materials into three categories: the first category could be classified as low-phosphorus tolerant varieties with the strongest comprehensive low-phosphorus tolerance; the second category was intermediate varieties with moderate low-phosphorus tolerance; the third category was low-phosphorus sensitive varieties with the weakest comprehensive low-phosphorus tolerance. In conclusion, this study established a multi-index comprehensive evaluation method, screened out low-phosphorus-tolerant rootstock-grafted seedlings such as Jingxin Rootstock No.1 and Qinkang Shuigua rootstock-grafted seedlings, and clarified their adaptation mechanisms from the aspects of photosynthetic maintenance, root plasticity and efficient phosphorus utilization, thereby providing a theoretical basis and methodological reference for the breeding of low-phosphorus tolerant watermelon rootstocks and the cultivation application of grafted seedlings.

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备注/Memo

备注/Memo:
收稿日期：2025-07-08基金项目：国家重点研发计划项目(2024YFD2001003-02)；陕西省农业关键核心技术攻关项目(2023NYGG008)；陕西省创新能力支撑计划项目(2025ZC-WTXM-51)作者简介：包星星(1999-),男,甘肃定西人,硕士研究生,研究方向为嫁接西瓜肥料利用。(E-mail)BXX063018@163.com通讯作者：丁明,(E-mail)dingming@nwsuaf.edu.cn
更新日期/Last Update: 2026-07-15