Anatomy and physiology of graft incompatibility in solanaceous plants
Anatomy and physiology of graft incompatibility in solanaceous plants
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DOI：
10.1080/14620316.2008.11512427
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发表时间：
2008-09-01
影响因子：
1.9
通讯作者：
Oda, M.
中科院分区：
文献类型：
--
作者：
Kawaguchi, M.;Taji, A.;Oda, M.
以番茄（Solanum lycopersicum L.）的代表品种为材料，茄子（Solanum melongena L.），和辣椒（Capsicum annuum L.）。嫁接（在）兼容性的程度进行了评估，通过检查嫁接植物的存活率，果实产量和果实质量。番茄/辣椒（接穗/砧木）和辣椒/番茄嫁接被认为是严重不亲和的，而番茄/茄子和茄子/番茄嫁接被认为是中度不亲和的，当与番茄/番茄、茄子/茄子和辣椒/辣椒的相容的同种特异性嫁接组合相比时。嫁接后3周或3周和6周，接穗和砧木的干重，碳水化合物浓度在茎以上和以下的嫁接工会，接穗矿质营养浓度，接穗的水势，木质部的导水率进行了测定在嫁接植物。同时观察移植物愈合的解剖结构。番茄/辣椒和辣椒/番茄移植物中的生长抑制和高死亡率（即，严重的嫁接不亲和性）是由于嫁接接合处的维管束不连续，这阻止了同化物、矿物质营养物和水在接穗和砧木之间的转移。番茄/茄子和茄子/番茄嫁接的果实产量和/或果实质量的降低（即，中度嫁接不亲和性）可能是由于番茄和茄子之间对同化物和矿物质营养的需求不同。茄科植物对嫁接不亲和性的反应因接穗和砧木的组合而异。
Graft incompatibility in solanaceous plants was investigated using representative cultivars of tomato (Solanum lycopersicum L.), eggplant (Solanum melongena L.), and pepper (Capsicum annuum L.). Evaluations of the extent of graft (in) compatibility were made by examining survival percentages, fruit yields, and fruit quality in grafted plants. Tomato/pepper (scion/rootstock) and pepper/tomato grafts were considered severely incompatible, and the tomato/eggplant and eggplant/tomato grafts were considered moderately incompatible, when compared with the compatible homo-specific graft combinations of tomato/tomato, eggplant/eggplant, and pepper/pepper. Three, or 3 and 6 weeks after grafting, the dry weights of scions and rootstocks, carbohydrate concentrations in stems above and below the graft unions, scion mineral nutrient concentrations, water potentials of scions, and xylem hydraulic conductivities were measured in the grafted plants. The anatomy of the graft unions was also observed. Growth inhibition and high mortality in tomato/pepper and pepper/tomato grafts (i.e., severe graft incompatibility) was due to discontinuities in the vascular bundles at the graft union, which prevented the translocation of assimilates, mineral nutrients, and water between scions and rootstocks. Reductions in fruit yield and/or fruit quality of tomato/eggplant and eggplant/tomato grafts (i.e., moderate graft incompatibility) may have been due to differences in the requirements for assimilates and mineral nutrients between tomato and eggplant. Plant responses to graft incompatibility varied in solanaceous plants depending on the scion and rootstock combination.