柑橘砧木和砧穗组合对丛枝菌根发育的影响  

EFFECT OF CITRUS ROOTSTOCKS AND ROOTSTOCKS/SCIONS ON DEVELOPMENT OFARBUSCULAR MYCORRHIZAS

作　　者：吴强盛[1] 夏仁学[1] 郭文武[2] 周开兵[1] 胡利明[1] 

机构地区：[1]华中农业大学园艺林学学院,武汉430070 [2]华中农业大学作物遗传改良国家重点实验室,武汉430070

出　　处：《土壤》2005年第1期95-99,共5页Soils

基　　金：国家科技部科技促进三峡移民开发专项(S200110)资助。

摘　　要：在2003年8月研究了田间5种不同砧穗组合的柑橘品种和盆栽的5种柑橘砧木(包括2种异源四倍体体细胞杂种砧木)对丛枝菌根发育的影响.结果表明,柑橘丛枝菌根侵染幅度为4.88%～40.52%,土壤内孢子密度不等,大致在347～750个孢子/kg(干土)内.田间菌根侵染率和孢子密度在不同土层深度的分布以深度10～20 cm为最高.遗传关系相近的国庆1号/枳和国庆4号/枳组合间以及红肉脐橙/罗伯逊脐橙36号/枳和纽荷尔脐橙/罗伯逊脐橙36号/枳间的丛枝菌根发育没有显著差异,与红肉脐橙和纽荷尔脐橙遗传关系远的脐血橙组合,较红肉脐橙和纽荷尔脐橙组合的孢子密度间有极显著差异.红桔+枳的菌根侵染率和土壤孢子密度均最高,且显著高于其他4种砧木.盆栽砧木孢子密度与菌根侵染率呈显著正相关性.10种试材的根围土壤孢子密度与菌根侵染率间呈极显著正相关性.An experiment was conducted to explore effects of combination of five different citrus rootstocks with five different scions on development of arbuscular mycorrhizas under pot culture and in the field in August 2003. The results show that colonization rate of arbuscular mycorrhizal ranged from 4.88% to 40.52%, and spore density from 347 spore/kg dry soils to 750 spore/kg dry soils. Development of Arbuscular mycorrhizas in different soil depths was investigated. The highest colonization rate and the highest spore density were found within the soil depth of 10~20cm. In Arbuscular mycorrhizal development, no significant difference was detected between Guoqing No.1/ Trifoliate and Guoqing No.4/Trifoliate and between Caca Caca/Robertson No. 36/Trifoliate and Newhall/Robertson No. 36/Trifoliate. They were significantly lower than Washington Sanguine/Robertson No. 36/Trifoliate. Arbuscular mycorrhizal development with the combination of Red Tangerine + Trifoliate was the highest among the rootstocks and was significantly higher than the other rootstocks. A positive significant correlativity (p≤0.05) existed between spore density and mycorrhizal colonization rate with citrus under pot culture. Moreover, a positive significant correlativity (P≤0.01) was also found between spore density and mycorrhizal infection rate with all the experimented citrus in the field and under pot culture as well.

关 键 词：柑橘 砧穗组合 砧木 丛枝菌根 丛枝菌根真菌 

分 类 号：S666[农业科学—果树学]