Arbuscular mycorrhizal fungi improve the growth and nodulation of the annual legume messina (Melilotus siculus) under saline and non-saline conditions

Wilson, B. A. L. and Ash, G. J. and Harper, J. D. I. (2012) Arbuscular mycorrhizal fungi improve the growth and nodulation of the annual legume messina (Melilotus siculus) under saline and non-saline conditions. Crop and Pasture Science, 63 (2). pp. 164-178. ISSN 1836-0947

Abstract

Messina [Melilotus siculus (Turra) Vitman ex. B. D Jacks] is a salt- and waterlogging-tolerant annual legume that could be highly productive on saline land. Arbuscular mycorrhizal (AM) fungi form a symbiotic relationship with the majority of terrestrial plant species, and improved productivity of plants inoculated with AM fungi under saline conditions has been attributed to the increased uptake of nutrients such as phosphorus (P). However, the mycorrhizal status ofM. siculus under saline or non-saline conditions is unknown, as is the role of AM in improved nutrition and nodulation. In this study, the role of AM fungi in growth improvement and nodulation of M. siculus was examined in saline and non-saline soil. The M. siculus plants were inoculated with either a single AM species or mixed AM species, or remained uninoculated, and were grown at three levels of sodium chloride (NaCl) (0, 80, and 250mMNaCl). AM-inoculated plants had significantly greater nodulation than plants that did not receive AMinoculum, regardless of salinity level. Plants inoculated with mixed AM species at 250mM NaCl showed improved survival (90%) compared with the plants inoculated with single AM species or uninoculated control plants (30%). Within each salinity level, plants inoculated with mixed AM species had significantly greater dry weight than all other treatments. In addition, plants inoculated with mixed AM species had increased total uptake of P. It is likely that the increased growth observed in AM-inoculated M. siculus plants is due to improved P nutrition, showing the potential of AM fungi to enhance the growth of M. siculus on saline land.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Institute for Agriculture and the Environment
Date Deposited: 30 Jan 2017 06:35
Last Modified: 21 Mar 2017 04:29
Uncontrolled Keywords: mycorrhiza, pasture, sodium, chloride
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Identification Number or DOI: 10.1071/CP11193
URI: http://eprints.usq.edu.au/id/eprint/29955

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