Transgenic Sunflower

Cantamutto, Miguel Ángel; Poverene, Mar√≠a

doi:10.1201/b10192-10

Cited by 6 publications

(4 citation statements)

References 152 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Argentina, the agrestal H. annuus has been described recently; however, it has been recognised as a noxious weed in more than twenty crops around the world (Casquero, ). Both ruderal and agrestal biotypes are non‐native invaders in four continents (Cantamutto & Poverene, ). Volunteers are not true feral biotypes because they cannot persist as self‐maintained populations (Gillespie & Miller, ).…”

Section: Introductionmentioning

confidence: 99%

Interference of the agrestal Helianthus annuus biotype with sunflower growth

Casquero

Cantamutto

2016

Weed Research

View full text Add to dashboard Cite

The Helianthus annuus taxon includes the wild (ruderal), weedy (agrestal) and volunteer biotypes, which may share space and time with the sunflower crop. The agrestal biotype is one of the most harmful weeds challenging the use of modern biotechnological tools in sunflower. The interference of the agrestal biotype was studied at a range of weed densities within a sunflower crop. The area of influence of one agrestal plant was estimated as a circular area of more than 2.5 m 2 . The agrestal biotype at 10.7 plants m À2 reduced the sunflower seed production by 66%, the seed weight by 41% and the yield by 80%. The agrestal biotype showed intermediate vegetative stage duration between sunflower and the ruderal biotype. The interference of the agrestal biotype would be due to its high initial growth rate, its larger leaf area and plant height. Some agrestal plants showed partial dehiscence at the sunflower harvest stage replenishing the soil seedbank with over 18 000 seeds m À2 . The sunflower harvest operation and grain storage might be affected due to a fraction of agrestal plants remaining alive and moist when the crop reached harvest maturity. The results support the recommendation of preventing the entry of the agrestal biotype into crop production fields.

show abstract

Section: Introductionmentioning

confidence: 99%

Interference of the agrestal Helianthus annuus biotype with sunflower growth

Casquero

Cantamutto

2016

Weed Research

View full text Add to dashboard Cite

show abstract

“…The cosmopolitan invasive H. annuus biotypes have limited the release of transgenic sunflower and challenge the durability of new technologies, due to the risk of crop‐wild gene flow (Cantamutto & Poverene, ). As in several countries, the invasive biotype H. annuus ssp.…”

Section: Introductionmentioning

confidence: 99%

Seed dormancy and hybridization effect of the invasive species, Helianthus annuus

Presotto

Poverene

Cantamutto

2014

Annals of Applied Biology

View full text Add to dashboard Cite

Helianthus annuus is an invasive alien species naturalised in the central region of Argentina where it shares an extended area with the sunflower crop. As this species has also invaded several other sunflower crop growing areas in the world, it severely restricts the use of new technologies, for example herbicide tolerance by genetic modification. The natural seed dormancy of the wild Helianthus strains from the centre of origin in North America is well known, but the seed dormancy of the invasive biotypes is still unknown. Dormancy is a fitness trait related to the establishment, dispersion and persistence of invasive weeds. Four experiments were designed to investigate the effect of the pericarp, light, temperature, the after-ripening period and hybridization with the DK3880CL sunflower crop (F1) on the seed dormancy of five invasive H. annuus biotypes. The results showed that pericarp scarification increased imbibition of the whole achene by 19%. Light stimulation only increased germination in the wild biotype without any effect on the domesticated sunflower. A period of 12 months after-ripening at 5°C reduced seed dormancy in the wild biotype and its progeny; the optimal temperature for seed germination at this period was found to be 15°C. Mechanical scarification was the best treatment for overcoming seed dormancy with a differential germination, in the biotypes with the highest response, superior to 63%. Hybridization with domesticated sunflower had a minimal or no effect on seed dormancy but the germination rate was improved in three F1 crosses. Wild biotype dormancy appears to be governed by the maternal pericarp and intrinsic hormone regulation. An increased germination rate of some progenies could constitute an advantage during seedling establishment but only in winters without any frost.

show abstract

“…Indeed, there is strong evidence that the weedy forms of H. annuus are not represented by a specific subspecies but are the natural result of hybridization with domesticated sunflower. There is evidence of crop introgression in weedy sunflowers since they combine wild and domesticated traits in proportions that vary between wild and domesticated plants [4,[85][86][87][88]. In some recent studies, the various forms of H. annuus are divided into the domesticated sunflower, the weedy sunflowers, which include the "agrestal" biotypes, and the wild sunflowers, which include the "ruderal" biotypes.…”

Section: Originmentioning

confidence: 99%

“…The importations of contaminated seed from the United States were the dominant hypothesis for the spread of weedy sunflowers in European fields [38,86,87]. As for the wild "ruderal" biotypes, their spread into non-crop areas such as roadsides, water channels, firebreaks, etc., is thought to be promoted by anthropogenic activities [39,85,90,91]. The ruderal biotypes can hybridize recurrently with the domesticated plants leading to the spread of highly competitive hybrids in the field [4,39,92].…”

Section: Originmentioning

confidence: 99%

Shattercane (Sorghum bicolor (L.) Moench Subsp. Drummondii) and Weedy Sunflower (Helianthus annuus L.)—Crop Wild Relatives (CWRs) as Weeds in Agriculture

et al. 2021

View full text Add to dashboard Cite

Shattercane (Sorghum bicolor (L.) Moench subsp. drummondii) and weedy sunflower (Helianthus annuus L.) are two examples of crop wild relatives (CWRs) that have become troublesome weeds in agriculture. Shattercane is a race belonging to a different subspecies than domesticated sorghum (Sorghum bicolor (L.) Moench subsp. bicolor). Weedy sunflower populations are natural hybrids between wild and domesticated sunflower (Helianthus annuus L.). Both species have key weedy characteristics, such as early seed shattering and seed dormancy, which play an important role in their success as agricultural weeds. They are widely reported as important agricultural weeds in the United States and have invaded various agricultural areas in Europe. Shattercane is very competitive to sorghum, maize (Zea mays L.), and soybean (Glycine max (L.) Merr.). Weedy sunflower causes severe yield losses in sunflower, maize, soybean, pulse crops, and industrial crops. Herbicide resistance was confirmed in populations of both species. The simultaneous presence of crops and their wild relatives in the field leads to crop–wild gene flow. Hybrids are fertile and competitive. Hybridization between herbicide-tolerant crops and wild populations creates herbicide-resistant hybrid populations. Crop rotation, false seedbed, cover crops, and competitive crop genotypes can suppress shattercane and weedy sunflower. Preventative measures are essential to avoid their spread on new agricultural lands. The development of effective weed management strategies is also essential to prevent hybridization between sorghum, sunflower, and their wild relatives and to mitigate its consequences.

show abstract

Transgenic Sunflower

Cited by 6 publications

References 152 publications

Interference of the agrestal Helianthus annuus biotype with sunflower growth

Interference of the agrestal Helianthus annuus biotype with sunflower growth

Seed dormancy and hybridization effect of the invasive species, Helianthus annuus

Shattercane (Sorghum bicolor (L.) Moench Subsp. Drummondii) and Weedy Sunflower (Helianthus annuus L.)—Crop Wild Relatives (CWRs) as Weeds in Agriculture

Contact Info

Product

Resources

About