Cannabinoids function in defense against chewing herbivores in Cannabis sativa L.  

作　　者：George M.Stack Stephen I.Snyder Jacob A.Toth Michael A.Quade Jamie L.Crawford John K.McKay John Nicholas Jackowetz Ping Wang Glenn Philippe Julie L.Hansen Virginia M.Moore Jocelyn K.C.Rose Lawrence B.Smart 

机构地区：[1]Horticulture Section,School of Integrative Plant Science,Cornell University,Cornell AgriTech,Geneva,NY 14456,United States [2]Plant Biology Section,School of Integrative Plant Science,Cornell University,Ithaca,NY 14853,United States [3]Plant Breeding Section,School of Integrative Plant Science,Cornell University,Ithaca,NY 14853,United States [4]Department of Agricultural Biology,Colorado State University,Fort Collins,CO 80523,United States [5]Cirona Labs,Geneva,NY 14456,United States [6]Department of Entomology,Cornell University,Cornell AgriTech,Geneva,NY 14456,United States

出　　处：《Horticulture Research》2023年第11期131-140,共10页园艺研究（英文）

摘　　要：In the decades since the first cannabinoids were identified by scientists,research has focused almost exclusively on the function and capacity of cannabinoids asmedicines and intoxicants for humans and other vertebrates.Very little is knownabout the adaptive value of cannabinoid production,though several hypotheses have been proposed including protection from ultraviolet radiation,pathogens,and herbivores.To test the prediction that genotypeswith greater concentrations of cannabinoidswill have reduced herbivory,a segregating F2 population of Cannabis sativa was leveraged to conduct lab-and field-based bioassays investigating the function of cannabinoids in mediating interactions with chewing herbivores.In the field,foliar cannabinoid concentration was inversely correlated with chewing herbivore damage.On detached leaves,Trichoplusia ni larvae consumed less leaf area and grew less when feeding on leaves with greater concentrations of cannabinoids.Scanning electron and light microscopy were used to characterize variation in glandular trichome morphology.Cannabinoid-free genotypes had trichomes that appeared collapsed.To isolate cannabinoids from confounding factors,artificial insect diet was amended with cannabinoids in a range of physiologically relevant concentrations.Larvae grew less and had lower rates of survival as cannabinoid concentration increased.These results support the hypothesis that cannabinoids function in defense against chewing herbivores.

关 键 词：FUNCTION FOUNDING ultraviolet 

分 类 号：S563.3[农业科学—作物学]