The adaptation of some temperate agricultural, native and weed species to aluminium and manganese ions in acid soils

Brian Rubzen, Edwin Wolfe, Keith Helyar

    Research output: Book chapter/Published conference paperConference paperpeer-review

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    No study has defined how the comparative adaptation of agricultural and weed species to aluminium and manganese toxicity may influence plant competition in acid soils. Root growth data from glasshouse and laboratory investigations were used in a non-linear dose response model to define the relative tolerance of some common agricultural, native and weed species to toxic concentrations of aluminium and manganese ions. One ryegrass ecotype was highly tolerant to both toxicities, Austrodanthonia linkii was highly susceptible and several weed species were tolerant. In addition, a rapid bioassay procedure was developed and used to broaden the range of plant species/cultivars evaluated for plant tolerance to Ca2+, H+ and Al3+. Another glasshouse experiment demonstrated that annual ryegrass (Lolium rigidum) ecotypes taken from soil types that were either acid (pH 3.7, 2.34 µg/mL Al3+) or alkaline (pH 8.2, 0.01 µg/mL Al3+) regulated the level of their competition with sensitive phalaris (cv. Sirolan, suppressed) or tolerant cocksfoot (cv. Porto, not suppressed). These results indicated the potential difficulty of establishing a sensitive plant type on acid soils if an adapted competitor also is present as a weed.
    Original languageEnglish
    Title of host publicationSystem Solutions for Complex Problems
    Subtitle of host publicationProceedings of the 20th Australian Agronomy Conference, Toowoomba Queensland, 18-22 September 2022
    PublisherAustralian Society of Agronomy
    Number of pages4
    Publication statusPublished - 2022
    Event20th Australian Agronomy Conference - Empire Theatre, Toowoomba, Australia
    Duration: 18 Sept 202222 Sept 2022 (Proceedings) (Program)


    Conference20th Australian Agronomy Conference
    Abbreviated titleSystem solutions for complex problems
    OtherThe theme of the conference is System Solutions for Complex Problems. The theme underpins the need to strengthen collaborations between practitioners and researchers from a wide range of disciplinary backgrounds to address increasingly complex problems and uncertainties. So, the question is not If, but when and how, multidisciplinary collaborations will be developed.
    The 20th Australian Agronomy Conference will feature leading international and national speakers addressing issues such as the need to foster soil biology for enduring profitability, carbon sequestration, herbicide resistance, and the interwoven relationships between food production, energy and the environment. We will discuss and share our latest research findings amongst circa 300 agronomists from Australia and the world, as well as farmers, consultants, agribusinesses and farmer peak bodies.
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