Genetically modified sunflower release: Opportunities and risks

Cantamutto, Miguel Ángel; Poverene, María Mónica

doi:10.1016/j.fcr.2006.11.007

Cited by 43 publications

(27 citation statements)

References 64 publications

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“…After introduction and naturalization, a successful plant invasion will happen if an adequate propagule pressure occurs into a vulnerable habitat (Huston 2004;Martinez-Ghersa and Ghersa 2006). Usually, as the propagule transportation is promoted by human activity, the plant invader migration patterns follow the transportation routes (Boot et al 2003). At an environmental level, soil, climate (Mann et al 1999;de Blois et al 2002;Shea and Chesson 2002;Sugiyama 2003;Retuerto and Carballeira 2004;Härdtle et al 2005;Milberg et al 2006) and the plant community structure (Inderjit et al 2005) modulate the geographical distribution of a nonnative invader.…”

Section: Introductionmentioning

confidence: 99%

Migration pattern suggested by terrestrial proximity as possible origin of wild annual Helianthus populations in central Argentina

Cantamutto

Torres²,

Presotto

et al. 2009

Biol Invasions

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There is a high interest to understand and recreate the invasive process of successful non-native plant invaders. The genetic tools provide scanty information when the invasion is recent and there is gene flow among the invader and its crop relative. The concern about the government and private companies' responsibilities in the diffusion process and the risk of occupancy of new areas motivated the interest in two wild annual Helianthus species naturalized in the central agricultural lands of Argentina. We used multivariate techniques and random tests to estimate the successive steps accomplished by the plant invaders across transportation routes, following an environmental and ecological gradient. A minimum connection tree through road distances was created considering dispersal from a unique dispersal point for each species. The proposed tree minimized, at the same time, the environmental and the ecological distances calculated by Euclidean and Gower indexes with abiotic and biotic habitat variables, being significantly different from random (P B 0.05). Our methodology allowed the development of an approach for the best estimation of the invasion route. This could be used to clarify the role of different agents involved in the diffusion process and to develop management strategies to prevent the plant invasion. The migration pattern suggests that after their historical introduction, both wild species moved in successive steps across a biotic and abiotic gradient, aided by anthropogenic activity along the road connection infrastructure. There were no evidences of escapes from sunflower breeding stations.

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Section: Introductionmentioning

confidence: 99%

Migration pattern suggested by terrestrial proximity as possible origin of wild annual Helianthus populations in central Argentina

Cantamutto

Torres²,

Presotto

et al. 2009

Biol Invasions

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“…Sunflower (Helianthus annuus) is the fifth most important source of edible oil after soybean, rapeseed, cotton, and peanut, with a worldwide seed production of 25.8 million tonnes destined almost exclusively to oil extraction, providing 8.2% of total world volume [4] (FAO, http://www.fao. org/statistics/).…”

Section: Introductionmentioning

confidence: 99%

Proteomic Analysis of Responses to Drought Stress in Sunflower (Helianthus annuus) Leaves by 2DE Gel Electrophoresis and Mass Spectrometry

Castillejo¹,

Maldonado²,

Ogueta³

et al. 2008

TOPROTJ

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By using a differential proteomic approach, responses to drought stress in sunflower have been studied. Two sunflower genotypes, showing different levels of tolerance to drought have been utilized. Following TCA-acetone protein extraction, the 2-DE leaf protein profile of well watered and drought stressed plants have been compared. Coomassie staining of the gels allowed visualization of around 350 well resolved spots within the 5-8 pH and 10-100 kDa ranges. Image analysis revealed the presence of both, qualitative and quantitative changes between genotypes and treatments. Differential spots were subjected to trypsin digestion and peptides were analyzed by MALDI-TOF mass spectrometry. After database search using peptide mass fingerprinting, 2 genotype-dependent and 23 (susceptible genotype) and 5 (tolerant genotype) stress-responsive protein spots were identified. The two proteins spots differentiating sunflower genotypes corresponded to phosphoglycerate kinase and glyceraldehyde-3-phosphate dehydrogenase. In response to drought conditions a general decrease in protein spots corresponding to enzymes of the photosynthesis and carbohydrate metabolism was observed in the more susceptible genotype, suggesting inhibition of the energetic metabolism. Such changes have not been observed in the tolerant genotype, indicating a normal metabolism under drought stress.

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“…The approval of transgenic Bt brinjal as the first genetically modified crop for human consumption in India is expected to result in benefits observed for other Bt crops, although approval has been initially met with controversy (Seetharam 2010). Other non-essential crops, like sunflower, are being also explored for commercial viability (Cantamutto and Poverene 2007).…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

Bt Crops: Past and Future

Castagnola

Jurat-Fuentes

2012

Bacillus Thuringiensis Biotechnology

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The development and commercialization of transgenic plants expressing insecticidal toxin genes from the bacterium Bacillus thuringiensis (Bt) has revolutionized agriculture in the past two decades. Development of this revolutionary insect pest control technology was facilitated by the identification and characterization of insecticidal Bt proteins and advancements in plant transformation and genetic engineering. While commercialization of this technology is currently limited to a number of countries, these transgenic "Bt crops" are replacing in most cases conventional crop varieties due to their insect resistance, lower spraying requirements, and higher yields. However, concerns related to the increasing adoption of this technology include gene flow to wild relatives, evolution of resistance in target pests, and unintended effects on the environment. In this chapter, we discuss key events in the history of Bt crop development and summarize current regulations aimed at reducing the risks associated with increased adoption of this technology. By analyzing the history of Bt transgenic crops and the current marketplace trends and issues, we aim to examine the outlook of current and impending Bt crops as well as potential issues that may emerge during their future use.

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Genetically modified sunflower release: Opportunities and risks

Cited by 43 publications

References 64 publications

Migration pattern suggested by terrestrial proximity as possible origin of wild annual Helianthus populations in central Argentina

Migration pattern suggested by terrestrial proximity as possible origin of wild annual Helianthus populations in central Argentina

Proteomic Analysis of Responses to Drought Stress in Sunflower (Helianthus annuus) Leaves by 2DE Gel Electrophoresis and Mass Spectrometry

Bt Crops: Past and Future

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