title: Effect of girdling at various positions of 'Huang Zhi Xiang' tea tree (Camellia sinensis) on the contents of catechins and starch in fresh leaf.
abstract: The contents of starch and catechins in the fresh leaf of 'Huang Zhi Xiang' Oolong tea trees girdled at the bottom, middle (on the big branches) and top (on the small branches) were determined. The study demonstrated that the starch contents from girdled trees were significantly higher (p<0.05) than that from non-girdled ones. Furthermore, the contents of (-)-epicatechin (EC), (-)-epigallocatechin (EGC), total catechins (TC) and simple catechins (SC) from girdled trees were significantly higher (p<0.05) than those from non-girdled ones. Especially, the contents of (-)-epigallocatechin gallate (EGCG), (-)-epicatechin gallate (ECG) and catechin gallate (CG) from girdled at the middle were also significantly higher (p<0.05) than those from the non-girdled. The starch contents were negatively correlated with the contents of (-)-gallocatechin (GC), EC, SC, TC and EGC, while positively correlated with the contents of EGCG and CG in fresh shoots.
authors.affiliation: South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Chen
authors.forename: Yueming
authors.initials: Y
authors.lastname: Jiang
authors.forename: John
authors.initials: J
authors.lastname: Shi
authors.forename: Xinlan
authors.initials: X
authors.lastname: Xu
authors.forename: Shaoyu
authors.initials: S
authors.lastname: Yang
authors.forename: Jun
authors.initials: J
authors.lastname: Duan
mesh_terms: D028241:Camellia sinensis / Q000737:chemistry*; D002392:Catechin / Q000031:analogs & derivatives / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D018515:Plant Leaves / Q000737:chemistry*; D013213:Starch / Q000032:analysis* / Q000737:chemistry
chemical_list: C417939:catechin gallate; D002392:Catechin; D013213:Starch; C062669:epicatechin gallate; C045651:epigallocatechin gallate; C057580:gallocatechol