Impact of flumioxazin herbicide on growth and carbohydrate physiology in Vitis vinifera L.
The impact of flumioxazin herbicide on in vitro-grown grapevine ( Vitis vinifera L. cv. Chardonnay) was investigated. The herbicide treatments (1, 10 or 100 micro M flumioxazin in MM medium) had a negative impact on photosynthesis, as revealed by a reduction in foliar chlorophyll and carotenoid contents, gas exchanges and alteration in plastid structure and, consequently, resulted in a strong inhibition of plantlet growth. Surprisingly, soluble sugars and starch accumulated in all organs, suggesting a stimulation of sugar uptake from the medium. Moreover, photosynthetic activity and starch content partially recovered within 3 weeks of treatment at the weakest herbicide concentration. These results provide new insights into the physiological responses of non-target crops to flumioxazin, showing that flumioxazin is active in photosynthetic tissues of the non-target grapevine via root uptake, which is contrary to what is mentioned in the literature, and that the in vitro-grown plantlet is a good model for investigating the physiological effects of pesticides on crop species.
Saladin
G
G
Laboratoire de Biologie et Physiologie Végétales, URVVC UPRES EA 2069, Université de Reims Champagne-Ardenne, UFR Sciences, Moulin de la Housse, BP 1039, 51687, Reims Cedex 2, France.
Magné
C
C
Clément
C
C
D048588:Benzoxazines; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000502:physiology; D002245:Carbon Dioxide / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D002736:Chloroplasts / Q000187:drug effects / Q000648:ultrastructure; D005632:Fructose / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D006540:Herbicides / Q000494:pharmacology*; D008854:Microscopy, Electron; D010078:Oxazines / Q000494:pharmacology*; D010100:Oxygen / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects / Q000502:physiology; D010797:Phthalimides / Q000494:pharmacology*; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D013213:Starch / Q000378:metabolism; D013395:Sucrose / Q000378:metabolism; D027843:Vitis / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism
D048588:Benzoxazines; D002241:Carbohydrates; D006540:Herbicides; D010078:Oxazines; D010797:Phthalimides; D002734:Chlorophyll; D002245:Carbon Dioxide; D005632:Fructose; D013395:Sucrose; D013213:Starch; D005947:Glucose; C106487:flumioxazin; D010100:Oxygen