[Allelopathy of grape root aqueous extracts].
Taking the tissue-cultured seedlings of grape cultivar Red Globe as test objects, this paper examined the effects of their root aqueous extracts on seedling's growth, with the allelochemicals identified by LC-MS. The results showed that 0.02 g x ml(-1) (air-dried root mass in aqueous extracts volume; the same below), 0.1 g x ml(-1), and 0.2 g x ml(-1) of the aqueous extracts inhibited the growth of the seedlings significantly, and the inhibition effect increased with increasing concentration of the extracts. The identified allelochemicals of the extracts included p-hydroxybenzoic acid, salicylic acid, phenylpropionic acid, and coumaric acid. Pot experiment showed that different concentration (0.1, 1, and 10 mmol x L(-1)) salicylic acid and phenylpropionic acid inhibited the seedling' s growth remarkably. With the increasing concentration of the two acids, the plant height, stem diameter, shoot- and root fresh mass, leaf net photosynthetic rate and starch content, and root activity of the seedlings decreased, while the leaf soluble sugar and MDA contents increased. No obvious change pattern was observed in leaf protein content.
Li
Kun
K
College of Horticulture, Shenyang Agricultural University, Shenyang 110161, China. xhgbox@163.com
Guo
Xiu-wu
XW
Guo
Yin-shan
YS
Li
Cheng-xiang
CX
Xie
Hong-gang
HG
Hu
Xi-xi
XX
Zhang
Li-heng
LH
Sun
Ying-ni
YN
D010666:Phenylpropionates / Q000302:isolation & purification / Q000494:pharmacology; D010675:Pheromones / Q000302:isolation & purification / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*; D020156:Salicylic Acid / Q000302:isolation & purification / Q000494:pharmacology; D036226:Seedlings / Q000187:drug effects* / Q000254:growth & development; D027843:Vitis / Q000737:chemistry*
D010666:Phenylpropionates; D010675:Pheromones; D010936:Plant Extracts; C019521:phenylpropiolic acid; D020156:Salicylic Acid