Herbivore feeding and cyanogenesis in Trifolium repens L.

Whitman, Richard J

doi:10.1038/hdy.1973.26

Cited by 17 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Slugs, which in some cases can discriminate between cyanogenic and acyanogenic phenotypes (see Crawford-Sidebotham, 1972, andAngseesing, 1974), were not responsible for the damage observed in our study. Furthermore, Whitman (1973) damage from other herbivore species that were not found in our colonising experiment. For example, white clover is a preferred host plant of Colias butterflies.…”

Section: Resultsmentioning

confidence: 89%

See 1 more Smart Citation

Herbivorous insects colonising cyanogenic and acyanogenic Trifolium repens

et al. 1979

View full text Add to dashboard Cite

SUMMARYInsect herbivores colonizing cyanogenic and acyanogenic white clover plants were investigated. With the exception of aphids, the herbivores studied were infrequent visitors and failed to discriminate between the two phenotypes. Aphids, however, were two to three times more abundant on acyanogenic than cyanogenic plants. Evidence of visible insect feeding damage was identical for both phenotypes. The evidence suggests that the trait of cyanogenesis confers protection against herbivory by aphids and, possibly, other insects. Such protection would be most important at the seedling stage, but feeding of the insects studied would not lead directly to seedling mortality of either phenotype. Instead, mortality of weakened seedlings may result from other causes later in the season.

show abstract

Section: Resultsmentioning

confidence: 89%

“…4. Dxscussio Whitman (1973) found an inverse correlation between cyanogenesis scores (as determined by reaction with picrate) and feeding damage in wild populations of white clover. The herbivores responsible were not recorded.…”

Section: Resultsmentioning

confidence: 99%

Herbivorous insects colonising cyanogenic and acyanogenic Trifolium repens

et al. 1979

View full text Add to dashboard Cite

show abstract

“…On the other hand, evidence for the action of biotic factors comes from differential eating by snails and slugs, as well as small mammals, the acyanogenic forms being preferred (see Whitman, 1973, andAngseesing, 1974; for similar findings in Lotus corniculatus, see Jones, 1966, andCrawfordSidebotham, 1972; negative findings were reported by Bishop and Korn, 1969). Jones (1973) provides a full discussion of these and related topics.…”

Section: Introductionmentioning

confidence: 87%

The relationship between altitude and cyanogenesis in white clover (Trifolium repens, L.)

Araújo

1976

Heredity

View full text Add to dashboard Cite

A total of 694 plants of Trfolium repens were collected in 17 samples to investigate the effect of altitude on the frequency of cyanogenic plants; the area chosen for this purpose was North Wales, with altitudes ranging from 100 to 1600 feet. A significant decrease in frequency of AcLi plants was observed, lower values obtained in high altitudes; the calculated regression coefficient was -001938 (in angular measure), with P<000l.

show abstract

“…The specific advantages conferred by cyanogenesis in New Zealand are not obvious. Cyanogenesis does not protect germinating clover seed from predation by slugs (Charlton 1978), although mature cyanogenic plants are usually damaged less than acyanogenic plants (Corkill 1952;Whitman 1973). Cyanogenic clover may be grazed by slugs, depending on the availability of other forage (Angseesing 1974).…”

Section: Resultsmentioning

confidence: 99%

Cyanogenesis potential and iodine concentration in white clover (Trifolium repensL.) cultivars

Crush

Caradus

1995

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

Hydrogen cyanide (HCN) and iodine (I) concentrations in the herbage were determined for 51 white clover (Trifolium repens L.) cultivars that had been grown under uniform conditions in a glasshouse. HCN contents ranged from 120 to 1110ngHCN/g dry matter (DM). Cultivars that are agronomically successful in New Zealand, and cultivars of New Zealand origin, were mainly highly cyanogenic. There was evidence in 'Grasslands Kopu' and 'Aran' of a decline in cyanide content in plants raised from first generation seed, compared to plants from Breeders or Basic seed. This decline may result in part from contamination of seed crops by low HCN resident clovers. Iodine concentration in the white clovers ranged from 0.08 to 0.21 µg I/g DM with 77% of values being below 0.12 µg I/g DM. There was no correlation between I and HCN concentrations. It seems there is little potential to improve the I nutrition of stock by selecting for increased I content in white clover. The influence of cyanogenic clover on the metabolism of I, selenium (Se), and sulphur (S) in sheep is discussed. It is concluded that these factors, and safety margins against direct cyanide toxicity, warrant further study. A94090

show abstract

Herbivore feeding and cyanogenesis in Trifolium repens L.

Cited by 17 publications

References 7 publications

Herbivorous insects colonising cyanogenic and acyanogenic Trifolium repens

Herbivorous insects colonising cyanogenic and acyanogenic Trifolium repens

The relationship between altitude and cyanogenesis in white clover (Trifolium repens, L.)

Cyanogenesis potential and iodine concentration in white clover (Trifolium repensL.) cultivars

Contact Info

Product

Resources

About