Medicago polymorpha L. var. brevispina (Benth.) Heyn (burr medic) cv. Santiago

Ewing, MA; Revell, C. K.; Thorn, C W

doi:10.1071/ea9890297

Cited by 3 publications

(6 citation statements)

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“…On mildly acidic soils in Western Australia growth of annual medic has been linked to the capacity of selected rhizobia to colonise acidic soil and persist (Howieson et al 1988), and to host plant capacity to nodulate under an acidity stress (Howieson and Ewing 1989). Current recommendations are for the use of selected Rhizobia in combination with M. murex and M. polymorpha cultivars (Gillespie 1989;Ewing et al 1989). In eastern Australia on mildly acidic soils, M. murex was superior to M. truncatula in its field performance (Dear and Jenkins 1992), and improved nodulation in M. murex and M. polymorpha compared to M. truncatula has been recorded (Young and Brockwell 1992).…”

Section: Introductionmentioning

confidence: 99%

Tolerance of aluminium toxicity in annual Medicago species and lucerne

Bellows¹,

Ewing

Williams

et al. 2008

Aust. J. Exp. Agric.

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A rapid (7 day) solution-based screening test was developed using 15 annual Medicago cultivars and one M. sativa. Based on a relative root regrowth after exposures to aluminium (Al), Zodiac (M. murex), Orion (M. sphaerocarpos) and the M. polymorha cultivars Santiago, Cavalier and Serena had the greatest Al tolerance. Herald (M. littoralis) and Rivoli (M. tornata) were most sensitive. Ranking for Al tolerance from the solution culture correlated well (r = 0.80) with ranking for tolerance of the 16 genotypes grown in an acidic soil (unlimed pHCa 4.1). We screened 17 Australian populations of lucerne (M. sativa) using a 24 h ‘pulse’ of 75 µmol/L Al, and a three day ‘recovery’ of 10 µmol/L Al. We identified and recovered plants with a root regrowth of ≥5 mm in all 17 populations with selection intensities of 2 to 4%. Four of these selected populations (Aurora, UQL-1, A513 and TO2-011) were polycrossed within each population to produce four populations of seed from the cycle 1 selections. The length of root regrowth under Al stress was improved for all four populations of cycle 1 selection (P ≤ 0.001; from 2.6 mm for the original populations to 6.3 mm for the cycle 1 selections). In a subsequent experiment the cycle 2 selections from Aurora, UQL-1 and TO2-011 had significantly greater root regrowth than both the cycle 1 selections (P ≤ 0.001; 8.3 cf. 6.6 mm) and the unselected populations (3.0 mm). The selections from TO2-011 appeared to have greater improvement in the average length of root regrowth after 2 cycles of selection. Selected germplasm was more tolerant than GAAT in our evaluation. Based on estimation of realised heritability, it seemed likely that higher selection intensities would give more rapid improvements in tolerance. Our studies have not investigated the physiological basis of any tolerance of Al which we observed.

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Section: Introductionmentioning

confidence: 99%

Tolerance of aluminium toxicity in annual Medicago species and lucerne

Bellows¹,

Ewing

Williams

et al. 2008

Aust. J. Exp. Agric.

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“…Medic produced more dry matter earlier, and sub-clover more later, an expected result in view of the known capacity of Serena medic to flower early (Ewing et al, 1985). Although legume production (results for medic and sub-clover combined) was undiminished by the presence of up to 40% grass, the medic appeared more vulnerable to competition from grasses, early in the growing season.…”

Section: Discussionmentioning

confidence: 89%

“…Although legume production (results for medic and sub-clover combined) was undiminished by the presence of up to 40% grass, the medic appeared more vulnerable to competition from grasses, early in the growing season. This may be related to the more upright growth habit of Serena medic than sub-clover (Ewing et al, 1985) which would provide a more open canopy which may enable the grasses to grow better.…”

Section: Discussionmentioning

confidence: 99%

“…Low soil pH has precluded the use of medic pastures in dry areas where sub-clovers have been unsuccessful or in wetter areas where there may be a desire to include legume pastures in intensive cropping systems (Ewing et al, 1985). However, with the introduction of the new burr medic (Medicago polymorpha L. var.…”

Section: Introductionmentioning

confidence: 99%

“…However, with the introduction of the new burr medic (Medicago polymorpha L. var. brevispina) varieties Serena and Circle Valley (Ewing et al, 1985) and acidtolerant rhizobia (Howieson and Ewing, 1986) there is potential for successful growth of these medics in certain slightly acidic (pH 6.0-7.0) soils, mainly sandy loams. Sub-clover is less suited to soils with a pH greater than 7.0 (Ewing et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Influence of grass proportion in stands of burr medic and subterranean clover on legume re-establishment and productivity following wheat

Cotterill

1990

Plant Soil

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A field-plot experiment investigated the re-establishment and productivity in 1987 (following wheat (Triticum aestivum) in 1986) of burr medic (Medicago polymorpha) and subterranean (sub-) clover (Trifolium subterraneum), which were each sown with 0, 20, 40, 60, 80, or 100% grass in 1985. There was no difference in the amount of dry matter production by medic or sub-clover over the whole growing season but medic was more productive earlier and sub-clover more productive later. Grass generally had little effect on legume or total dry matter production at proportions <40%, though medic productivity was slightly more vulnerable to the effect of grass-infestation than sub-clover.

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Preliminary assessment of bladder clover (Trifolium spumosum L.) as an annual legume for ley farming systems in southern Australia

et al. 2012

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Trifolium spumosum L. (bladder clover) is an aerial seeding annual legume that is adapted to fine-textured soils throughout the Mediterranean Basin. This article is the first of two papers that describe the process of domestication of T. spumosum as a new species to commercial agriculture. This paper describes a broad range of investigations into the ecology, agronomy and rhizobiology of this new species. Through a series of five experiments, we have tested the general hypothesis that T. spumosum accessions demonstrate a range of sought-after agronomic traits and offer an alternative to annual Medicago spp. for ley farming systems in the medium to low rainfall areas of the mixed crop/livestock zone of southern Australia. T. spumosum presents seeds at the top of the canopy in heads that do not readily shatter, so seed can be harvested using conventional cereal harvesters instead of the specialist suction equipment required for harvest of seed from annual T. subterraneum and Medicago spp. T. spumosum was found to be relatively fecund and had high levels of biomass production in comparison to the other annual legumes that were tested. The species also demonstrated high levels of within-season hardseededness (remaining hard in summer and softening in autumn) so seedbanks would be protected from summer rainfall events. In addition, T. spumosum showed high levels of between-season dormancy, which allows the species to carry a seedbank through a cropping phase or series of poor seasons. A herbicide experiment showed that clover species varied in tolerances, with T. spumosum the least sensitive of all of the legumes tested to Flumetsulam. A cross-inoculation experiment to measure symbiotic effectiveness revealed that WSM1325 (current clover strain) surpasses WSM409 (previous strain) in its relationship with the annual clovers of contemporary interest, while being highly effective at nitrogen fixation with T. spumosum. The results of this study and an associated investigation into feeding value indicate that T. spumosum offers a productive alternative to annual Medicago spp. on fine-textured soils. Of the T. spumosum accessions tested, the most promising has been released under the cultivar name of AGWEST Bartolo.

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Medicago polymorpha L. var. brevispina (Benth.) Heyn (burr medic) cv. Santiago

Cited by 3 publications

References 0 publications

Tolerance of aluminium toxicity in annual Medicago species and lucerne

Tolerance of aluminium toxicity in annual Medicago species and lucerne

Influence of grass proportion in stands of burr medic and subterranean clover on legume re-establishment and productivity following wheat

Preliminary assessment of bladder clover (Trifolium spumosum L.) as an annual legume for ley farming systems in southern Australia

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