In order to improve the production of Trichosanthes kirilowii in the red soil and provide theoretical support for the cultivation of acid soils. Mainly in compare the difference of aluminum tolerance in between two places of origin

and determine the best relief concentration. Two kinds of Trichosanthes kirilowii Maxim.

Baoding Trichosanthes kirilowii and Puyang Trichosanthes kirilowiiis selected as the experiment materials. Six different concentrations of Al3 + and abscisic acid were set up. To study the interaction of Al3+ and ABA on the root length

chlorophyll fluorescence characteristics

root activity

MDA content

antioxidant enzyme activity and antioxidant content of two species of the plant. The results show: (1) Baoding Trichosanthes kirilowii and Pu Yang Trichosanthes kirilowii under the effect of aluminum stress and exogenous abscisic acid

each index reflects similar trend

but varying degrees of each index and sensitivity revealed some differences

Baoding Trichosanthes kirilowii has stronger resistance ability of aluminum. (2)Aluminum threat forced two varieties of Trichosanthes kirilowii root length

root activity

Fv/Fm

Fm

ETR

SOD

POD

CAT and ASA

GSH content are decreased

and F0

MDA and DAsA rise. (3) After exogenous abscisic acid is added

two varieties of Trichosanthes kirilowii root length

root activity

chlorophyll fluorescence parameters except F0

anti-oxidase and ascorbate glutathione cycle system (ASA and GSH) show the trend of first increased and then decreased

MDA was decreased continuously

F0 and DAsA presented by the descending and ascending trend. 5 mg/L of exogenous abscisic acid make root length

root activity

Fv/Fm

Fm

ETR

SOD

POD

CAT and ASA

GSH rose to a peak

MDA decreased

F0 and DAsA down to the valley. (4)Through membership function and the analysis of the aluminum resistance coefficient

two varieties of Trichosanthes kirilowii can get the same result

the ability of Al tolerance: 5 mg/L＞7.5 mg/L＞2.5 mg/L＞0 mg/L＞10 mg/L. So the ability of aluminum resistance Baoding Trichosanthes kirilowii is stronger than Puyang Trichosanthes kirilowii

low concentration of exogenous abscisic acid can alleviate the stress of aluminum

but when the exogenous abscisic acid concentration is too high

unable to protect the plant from aluminum stress influence function

namely “promoting at the low concentration and high concentration inhibit”

5 mg/L ABA can effectively relieve Al stress

So we should select aluminum resistant Trichosanthes kirilowii to plant

supplemented with appropriate concentration of exogenous ABA.