title: Selective trans-cinnamic acid uptake impairs [Ca2+]cyt homeostasis and growth in Cucumis sativus L.
abstract: To obtain insight into interspecies interactions mediated by allelochemicals, the response of cucumber (Cucumis sativus L. cv Jinyan No.4) and figleaf gourd (Cucurbita ficifolia Bouché) seedlings to trans-cinnamic acid (CA) (1) was investigated. While trans-CA is an autotoxin in cucumber root exudates, figleaf gourd is resistant to it. Cucumber, however, had a high rate of trans-CA uptake by the roots, leading to reduced root growth. The trans-CA treatment also resulted in an intracellular release of Ca(2+) from the vacuole to the cytoplasm, and, thus, an increased [Ca(2+)](cyt) level accompanied by gradual loss of cell viability in cucumber roots. Taken together, these results suggest that [Ca(2+)](cyt) homeostatic disturbance is one of the primary triggers for trans-CA phytotoxicity in cucumber.
authors.affiliation: Department of Horticulture, Huajiachi Campus, Zhejiang University, Hangzhou, People’s Republic of China.
authors.forename: Jingquan
authors.initials: J
authors.lastname: Yu
authors.forename: Yao
authors.initials: Y
authors.lastname: Sun
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ju
authors.initials: J
authors.lastname: Ding
authors.forename: Xiaojian
authors.initials: X
authors.lastname: Xia
authors.forename: Chunlan
authors.initials: C
authors.lastname: Xiao
authors.forename: Kai
authors.initials: K
authors.lastname: Shi
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D002118:Calcium / Q000378:metabolism*; D002934:Cinnamates / Q000378:metabolism*; D018553:Cucumis sativus / Q000254:growth & development* / Q000378:metabolism; D028464:Cucurbita / Q000254:growth & development* / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism
chemical_list: D002934:Cinnamates; C029010:cinnamic acid; D002118:Calcium