Allelopathic effects of leaf extract from Eupatorium adenophorum on Alternanthera philoxeroides

作者：Chen, H. B.; Yang, C. P.; Wang, W. M.; Gong, G. S.; Zhang, M.^*

来源：Allelopathy Journal, 2016, 39(1): 93-101.

• Allelopathy
• alligator weed
• Alternanthera philoxeroides
• biochemical parameters
• cell structure
• crofton weed
• enzymes
• Eupatorium adenophorum
• physiological parameters
• phytotoxic effect

We studied the phytotoxic effects of leaf extract from crofton weed (Eupatorium adenophorum Spreng.) on alligator weed (Alternanthera philoxeroides (Mart.) Griseb.). The aqueous leaf extracts from the crofton weed drastically inhibited the root growth of alligator weed at 0.04 g.mL(-1) concentration. There was no root or few roots only at the bottom stem node, when the concentration reached to 0.08 g.mL(-1). These extracts also changed the physiological and biochemical parameters in treated alligator weed. The chlorophyll content, the root activity and the acetolactate synthase (ALS) activity were significantly decreased. While the superoxide anion (O-2(-)), the malondialdehyde (MDA) content, peroxidase (POD) activity and shikimic acid content were significantly increased, these reflect the stressful conditions. Thus, the main allelopathic effects of crofton weed were on the cell structure, cell membrane and the activity of key enzymes in amino acid biosynthesis. Our data also showed that crofton weed may be used in bio-control of alligator weed.

• 出版日期2016-9
• 单位四川农业大学