How does arbuscular mycorrhizal colonization vary with host plant genotype? An example based on maize (Zea mays) germplasms

被引:88
作者
An, G. -H. [1 ]
Kobayashi, S. [1 ]
Enoki, H. [1 ]
Sonobe, K. [1 ]
Muraki, M. [2 ]
Karasawa, T. [3 ]
Ezawa, T. [4 ]
机构
[1] Natl Agr Res Ctr Hokkaido Reg, Sapporo, Hokkaido 0628555, Japan
[2] Natl Agr Res Ctr Kyushu Okinawa Reg, Miyakonojo 8850091, Japan
[3] Natl Agr Res Ctr, Tsukuba, Ibaraki 3058666, Japan
[4] Hokkaido Univ, Grad Sch Agr, Kita Ku, Sapporo, Hokkaido 0608589, Japan
关键词
Arbuscular mycorrhizal (AM) fungus; Colonization; Germplasm; Maize (Zea mays); Origin; Plant breeding program; ORYZA-SATIVA L; PHOSPHORUS-NUTRITION; CULTIVATED PLANTS; TALLGRASS PRAIRIE; PREVIOUS CROPS; FUNGI; GROWTH; DEPENDENCY; INFECTION; RESPONSIVENESS;
D O I
10.1007/s11104-009-0073-3
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Colonization of plant roots by arbuscular mycorrhizal (AM) fungi is a primary factor determining mycorrhizal associations. This study aimed to investigate the variation in AM colonization among maize genotypes and in response to plant breeding programs. Three types of maize (Zea mays) germplasms composed of 141 inbred lines, 38 hybrids, and 76 landraces were grown in replicated field experiments in Sapporo, Japan, for two cropping years to evaluate the percentage of root length colonized by indigenous AM fungi. The percent colonization varied greatly and continuously among maize genotypes. Inbred lines that originated (released) in particular locations (e.g., Tokachi, Japan) and years (e.g., 1960s) showed significantly larger values than other lines. Inter-location differences were also observed for landraces. The direction of the year-of-release effect on colonization depended on the origin. No significant differences were observed between leaf-blight-disease-resistant near-isogenic inbred lines and their parents. Modern hybrids showed significantly greater values than inbred lines and older landraces. Evaluating numerous, diverse genotypes demonstrated that AM colonization of maize plants varies with germplasm type, origin (country and location), and year of release, and that modern plant breeding programs do not necessarily lead to the suppression of colonization.
引用
收藏
页码:441 / 453
页数:13
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