Interactions of sunflower (Helianthus annuus) and sunflower broomrape (Orobanche cumana) as affected by sowing date, resource supply and infestation level

Grenz, Jan; Iştoc, V.A.; Manschadi, Ahmad M.; Sauerborn, Joachim

doi:10.1016/j.fcr.2008.02.003

Cited by 27 publications

(27 citation statements)

References 30 publications

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“…Sometimes, the decrease in host biomass is not fully compensated for by parasite biomass (Grenz et al, 2008). In this case, photosynthetic protein diversion is likely to prevent the host from maintaining its photosynthetic level.…”

Section: Consequences Of Nutrient Diversion On the Growth And Agronommentioning

confidence: 99%

What are the traits of Phelipanche ramosa (L.) Pomel that contribute to the success of its biological cycle on its host Brassica napus L.?

Gibot‐Leclerc

Sallé

Reboud

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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International audienceIn France, the fact that the holoparasitic plant Phelipanche ramosa has adapted to oilseed rape over the past two decades is deeply worrying, as it can cause over 80% yield losses. Its distribution area and the range of its host plants, whether they are cultivated plants or weeds, are expanding dramatically. As no natural regression of the infestation has been recorded so far, we undertook a detailed study of the different steps of the biological cycle of the P. ramosa/oilseed rape pathosystem to determine the adaptive traits that favour the parasite's success. We combined experimental approaches involving controlled conditions with in vitro and in pot co-cultivation on the one hand and a field trial on the other hand. These experiments allowed us to determine a 4-mm zone around host roots within which oilseed rape root exudates stimulate the germination of P. ramosa, the early action of host root exudates and the rapid fixation of the parasite on host roots. We also unveiled that P. ramosa was able to tune its biological cycle to that of oilseed rape. The important trophic relationships between the parasite and its host induced phenotypic (dwarfism, leaf chlorosis, silique abortion) as well as agronomical (90% yield losses) consequences on oilseed rape. Our results can constitute a relevant basis for further experimental studies. The research perspectives they open will focus on key-processes of the host-parasite relationship, and more particularly on the trophic relationships that are set up as far as carbon assimilates and minerals such as nitrogen are concerned. (C) 2012 Elsevier GmbH. All rights reserved

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Section: Consequences Of Nutrient Diversion On the Growth And Agronommentioning

confidence: 99%

What are the traits of Phelipanche ramosa (L.) Pomel that contribute to the success of its biological cycle on its host Brassica napus L.?

Gibot‐Leclerc

Sallé

Reboud

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…These properties facilitate observations and rendered them the choice of plants for this study. Research of various crops and their growth in terms of soil packing (Bayhan et al, 2002), sowing date and its density for different conditions of hydration, access to light (Ferreira and Abreu, 2001), parasites (Grenz et al, 2008) and stress conditions were conducted alongside the research of germination and growth of sunflowers. Sunflower kernels are a rich source of oil and may be used for food (Mamat et al, 2005;Smith et al, 2007), as ornamental flowers (Friedman et al, 2007), as an admixture to diesel fuel as well as biodiesel in the form of methyl esters made from sunflower oil (Rashid et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on seed germination and seedling growth of sunflower

Matwijczuk¹,

Kornarzyński²,

Pietruszewski³

2012

International Agrophysics

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A b s t r a c t. The impact of a variable magnetic field, magnetically treated water and a combination of both these factors on the germination of seeds and the final mass at the initial stage of growth sunflower plants was presented. Investigations were carried out in pots filled with sand, tin an air-conditioned plant house with no access to daylight using fluorescent light as illumination. A statistical significance positive impact was achieved for the samples subjected to the interaction of both stimulating factors simultaneously, the magnetic field and the impact of treated water several times on the speed of seed germination and final plant mass. Negative impacts were obtained for the majority of the test cases, for the magnetically treated water, the short duration of activity of the magnetic field and for the connection of the magnetic field and low-flow times.K e y w o r d s: seed stimulation, magnetic field, magnetically treated water

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“…Parasites mainly acted as an extra sink for assimilates during sunflower generative growth and impaired host photosynthesis to a much lesser degree. Results suggest that similar mechanisms govern infection level and hostparasite biomass partitioning across different Orobanche -host systems (Grenz et al, 2008).…”

Section: Introductionmentioning

confidence: 86%

Effects of nitrogen and irrigation interval on broomrape (Orbanche aegyptiaca) damage reduction in host plant (Cucumis sativa L.)

Mehrnoush¹,

Gholam²,

Masoud³

et al. 2012

Int. J. Plant Physiol. Biochem.

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In order to study the effects of nitrogen and irrigation interval on broomrape (Orbanche aegyptiaca) damage reduction in cucumber (Cucumis sativa L.), an experiment with two factors, nitrogen (100, 200 and 300 Kg/ha) and irrigation interval (3, 6 and 9 day), in three replications was performed in the greenhouse of Northern Khorasan Agricultural and Natural Resource Research Center. The results obtained show that the seedling emergence was maximum in the treatment of 200 Kg N/ha. However, plant height and plant number of cucumbers were lower. The number of flowering days was significant under effect of irrigation interval, whereas nitrogen fertilizer did not have a significant influence on this parameter. Hence, increase in irrigation interval caused reduction in the number of flowering days. Maximum length and diameter of cucumber were observed in the highest nitrogen level and minimum irrigation interval or the lowest nitrogen level and medium irrigation interval. The maximum number of cucumbers and weight was obtained in maximum nitrogen and irrigation interval. Increase in irrigation interval caused the number of cucumber to increase and the cucumber weight to decrease. Maximum wet weight of shoot and root were observed in the highest nitrogen treatment. The results also revealed that usage of high and medium nitrogen fertilizer with short time irrigation interval had minimum parasite damage reduction in cucumber yield.

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Interactions of sunflower (Helianthus annuus) and sunflower broomrape (Orobanche cumana) as affected by sowing date, resource supply and infestation level

Cited by 27 publications

References 30 publications

What are the traits of Phelipanche ramosa (L.) Pomel that contribute to the success of its biological cycle on its host Brassica napus L.?

What are the traits of Phelipanche ramosa (L.) Pomel that contribute to the success of its biological cycle on its host Brassica napus L.?

Effect of magnetic field on seed germination and seedling growth of sunflower

Effects of nitrogen and irrigation interval on broomrape (Orbanche aegyptiaca) damage reduction in host plant (Cucumis sativa L.)

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