Variation in the effectiveness of symbiotic associations between native rhizobia and temperate Australian Acacia: within‐species interactions

Journal of Applied Ecology - Tập 36 Số 3 - Trang 398-408 - 1999
Jeremy J. Burdon1, A. H. Gibson1, Suzette D. Searle2, Matthew J. Woods1, J Brockwell1
1Centre for Plant Biodiversity Research, CSIRO-Plant Industry, GPO Box 1600, Canberra, ACT 2601, Australia; and
2CSIRO Forestry and Forest Products, PO Box E4008, Kingston, ACT, 2604, Australia

Tóm tắt

1. The ability of different rhizobial isolates collected from any one site to establish effective nitrogen‐fixing associations with host‐plants from that site showed significant variation in 22 host Acacia species and nearly all of 67 populations. The average Acacia host–Rhizobium strain combination was only about 70% effective. Many combinations were far poorer; in a few cases the worst combination resulted in plants less than one‐tenth the size of the best combinations. 2. The ability of rhizobial isolates to form effective symbiotic interactions showed marked host population and rhizobial‐isolate effects in a study of eight, four and nine populations of A. dealbata, A. implexa and A. mearnsii. A more complete trial involved three populations of each of A. dealbata, A. implexa, A. irrorata, A. mearnsii and A. melanoxylon. These were inoculated with a range of rhizobial isolates previously shown to be highly, moderately or weakly successful in forming an effective association. Evidence of marked host population and rhizobial origin effects was found but there was very little evidence of isolate–host population interaction effects. 3. The general lack of host population–rhizobial origin interaction effects suggests that rhizobial strains selected as highly effective for an Acacia species growing in a particular population will generally perform well symbiotically with that species in other populations. This will make their practical application as inoculants in revegetation and forestry situations much easier. 4. Significant host‐based variability in the ability to form effective symbiotic interactions was detected in comparisons of half‐sib families of A. dealbata, A. mearnsii and A. melanoxylon. In the case of A. dealbata, the interaction between half‐sib family lines and rhizobial isolates was complex, with ‘locally’ derived isolates performing better than ‘foreign’ ones. There were also significant interaction effects. In A. mearnsii, on the other hand, the only significant differences were detected between the response of different half‐sib families to the same rhizobial isolate. The occurrence of host‐based variability indicates that in Acacia breeding programmes attention should be given to the possibility of inadvertent selection affecting these relationships.

Từ khóa


Tài liệu tham khảo

Allen O.N., 1981, The Leguminosae. A Source Book of Characteristics, Uses, and Nodulation

10.1007/BF00014783

Brockwell J., 1998, Acacia. Recent Developments in Acacia Planting, 264

10.1016/S0065-2504(08)60098-7

Dart P., 1991, Advances in Tropical Acacia Research, 13

10.1071/AR9640037

10.1093/jxb/38.1.26

Hely F.W., 1959, Adjustable shading to modify glasshouse temperatures., Journal of Agricultural Engineering Research, 4, 133

10.2307/2403495

Lafay B., 1998, Molecular diversity of rhizobia occurring on native shrubby legumes in south‐eastern Australia., Applied and Environmental Microbiology, 64, 3989, 10.1128/AEM.64.10.3989-3997.1998

10.1071/BT9820087

10.1111/j.1744-7348.1975.tb01604.x

10.1007/BF00021707

Read D.J., 1993, Biodiversity and Ecosystem Function, 181

Roughley R.J., 1987, Australian Acacias in Developing Countries, 45

Sherry S.P., 1971, The Black Wattle

Sun J., 1991, Ninth Australian Nitrogen Fixation Conference, 118

Thornton H.G., 1980, The early development of the root nodule of lucerne (Medicago sativa L.)., Annals of Botany, London, 44, 385

Vincent J.M.1970.A Manual for the Practical Study of the Root‐Nodule Bacteria. Handbook no. 11. IBP Oxford UK.

Thông tin
Thông tin xuất bản

Journal of Applied Ecology

Tập 36 Số 3

398-408

Thông tin tác giả