Foraging behaviour of honey bees (Apis mellifera L.) on transgenic oilseed rape (Brassica napus L.var. oleifera)

1995 ◽  
Vol 4 (4) ◽  
pp. 270-276 ◽  
Author(s):  
A. L. Picard-Nizou ◽  
M. H. Pham-Delègue ◽  
V. Kerguelen ◽  
P. Douault ◽  
R. Marilleau ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Brassica Napus ◽  
Oilseed Rape ◽  
Honey Bees ◽  
Foraging Behaviour ◽  
Transgenic Oilseed Rape

Pesticide residues in the pollen and nectar of oilseed rape (Brassica napus L.) and their potential risks to honey bees

2021 ◽  
pp. 147443
Author(s):  
Xiaolin Wen ◽  
Changsheng Ma ◽  
Minghui Sun ◽  
Ye Wang ◽  
Xiaofeng Xue ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Honey Bees ◽  
Pesticide Residues ◽  
Brassica Napus L ◽  
Potential Risks

Frequency and distance of pollen dispersal from transgenic oilseed rape (Brassica napus)

1993 ◽  
Vol 2 (6) ◽  
pp. 356-364 ◽  
Author(s):  
Jodi A. Scheffler ◽  
Russell Parkinson ◽  
Philip J. Dale
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Pollen Dispersal ◽  
Transgenic Oilseed Rape

scholarly journals Apis mellifera (Hymenoptera: Apidae) as a potential Brassica napus pollinator (cv. Hyola 432) (Brassicaceae), in Southern Brazil

2010 ◽  
Vol 70 (4) ◽  
pp. 1075-1081 ◽  
Author(s):  
AS. Rosa ◽  
B. Blochtein ◽  
NR. Ferreira ◽  
S. Witter
Keyword(s):  
Apis Mellifera ◽  
Brassica Napus ◽  
Foraging Behaviour ◽  
Winter Season ◽  
Pollen Load ◽  
Southern Brazil ◽  
Floral Constancy ◽  
Food Shortages ◽  
Bee Foraging ◽  
Winter Crop

Brassica napus Linnaeus is considered a self-compatible crop; however, studies show that bee foraging elevates their seed production. Considering bee food shortages during the winter season and that the canola is a winter crop, this study aimed to evaluate the foraging behaviour of Apis mellifera Linnaeus, 1758 regarding those flowers, and to verify if it presents adequate behaviour for successfully pollinating this crop in Rio Grande do Sul State. The study was carried out in a canola field, in Southern Brazil. The anthesis stages were morphologically characterised and then related to stigma receptivity and pollen grain viability. Similarly, the behaviour of A. mellifera individuals on flowers was followed, considering the number of flowers visited per plant, the amount of time spent on the flowers, touched structures, and collected resources. Floral fidelity was inferred by analysing the pollen load of bees collected on flowers. The bees visited from 1-7 flowers/plant (x = 2.02; sd = 1.16), the time spent on the flowers varied between 1-43 seconds (x = 3.29; sd = 2.36) and, when seeking nectar and pollen, they invariably touched anthers and stigmas. The pollen load presented 100% of B. napus pollen. The bees' attendance to a small number of flowers/plants, their short permanence on flowers, their contact with anthers and stigma and the integral floral constancy allows their consideration as potential B. napus pollinators.

scholarly journals The factors influencing the pollinators visitation of the oilseed rape cultivars

2019 ◽  
Vol 65 (No. 12) ◽  
pp. 574-580
Author(s):  
Jan Kazda ◽  
Aneta Bokšová ◽  
Martina Stejskalová ◽  
Tomáš Šubrt ◽  
Jan Bartoška ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Oilseed Rape ◽  
Honey Bees ◽  
Bumble Bees ◽  
Major Influence ◽  
Winter Oilseed Rape ◽  
Pollinator Visitation ◽  
Factors Influencing ◽  
Visitation Rates ◽  
The Individual

Currently, the hybrid cultivars are predominant in the cultivation of winter oilseed rape in Europe. Cultivation of hybrid cultivars instead of the traditional line can affect the visitation of pollinators. Beekeepers and farmers claim that hybrid cultivars are not visited by pollinators as much as the line. Ten yellow and one white flowering oilseed rape cultivars were used to compare the visitation rates of pollinators (Apis mellifera L. and Bombus sp.) during flowering in the years 2015–2017. At the same time, the visitation of hybrid and line cultivars by pollinators was evaluated. Visitation of pollinators on each cultivar was calculated from observed visitations to flowering oilseed rape plants in an area 2.1 m<sup>2</sup> from the edge of single plots for 20 s. The results from this study clearly show that the individual cultivars, whether hybrids or lines, did not have a major influence on the pollinators’ visitation, either by honey bees or bumble bees. It is thus proved that hybrid cultivars do not affect the pollinator visitation and there is no need to worry about the prevalence of these cultivars in the Czech fields. However, a more significant effect for both pollinator groups appears to have been the color of the flower.

Low level impurities in imported wheat are a likely source of feral transgenic oilseed rape (Brassica napus L.) in Switzerland

2015 ◽  
Vol 22 (21) ◽  
pp. 16936-16942 ◽  
Author(s):  
Juerg Schulze ◽  
Peter Brodmann ◽  
Bernadette Oehen ◽  
Claudia Bagutti
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Brassica Napus L ◽  
Low Level ◽  
Transgenic Oilseed Rape

scholarly journals Overexpression of Brassica napus MPK4 Enhances Resistance to Sclerotinia sclerotiorum in Oilseed Rape

2009 ◽  
Vol 22 (3) ◽  
pp. 235-244 ◽  
Author(s):  
Zheng Wang ◽  
Han Mao ◽  
Caihua Dong ◽  
Ruiqin Ji ◽  
Li Cai ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Transgenic Plants ◽  
Oilseed Rape ◽  
Sclerotinia Sclerotiorum ◽  
Mitogen Activated Protein Kinase ◽  
Economic Losses ◽  
Loss Of Function ◽  
Mitogen Activated Protein ◽  
Transgenic Oilseed Rape ◽  
Plant Pathogen Interactions

Sclerotinia sclerotiorum causes a highly destructive disease in oilseed rape (Brassica napus) resulting in significant economic losses. Studies on the Arabidopsis thaliana MPK4 loss-of-function mutant have implicated that AtMPK4 is involved in plant defense regulation, and its effect on disease resistance varies in different plant–pathogen interactions. In this study, we isolated a B. napus mitogen-activated protein kinase, BnMPK4, and found that BnMPK4 along with PDF1.2 are inducible in resistant line Zhongshuang9 but both are consistently suppressed in susceptible line 84039 after inoculation with S. sclerotiorum. Transgenic oilseed rape overexpressing BnMPK4 markedly enhances resistance to S. sclerotiorum and Botrytis cinerea. Further experiments showed that transgenic plants inhibited growth of S. sclerotiorum and constitutively activated PDF1.2 but decreased H2O2 production and constitutively suppressed PR-1 expression. Treatment of roots of the transgenic plants with H2O2 solution resulted in enhanced susceptibility to the two pathogens. Our results support the idea that MPK4 positively regulates jasmonic acid-mediated defense response, which might play an important role in resistance to S. sclerotiorum in oilseed rape.

Detection of feral GT73 transgenic oilseed rape (Brassica napus) along railway lines on entry routes to oilseed factories in Switzerland

2013 ◽  
Vol 21 (2) ◽  
pp. 1455-1465 ◽  
Author(s):  
Mirco Hecht ◽  
Bernadette Oehen ◽  
Jürg Schulze ◽  
Peter Brodmann ◽  
Claudia Bagutti
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Transgenic Oilseed Rape
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