| Seedlings of cucumber Jinyou one coated with seed coating configerated from different concentration of salicylic acid, betaine, CCC, PP333 and hormone NAA,define concentration of pesticides and Hoagland solution was used to study physiological and biochemical changes under water stress for 4-6 days. Through above research, influence of different formula seed coating on anti-drought was explored to provide certain theorical evidence and feasible reference for enhancing cucumber seedling anti-drought,nurturing strong seedling,improving output and quality cucumber.laid certain foundation for research and application of seed coating of vegetable and other corp seed. Results as following:1.Treatment concentration of salicylic acid range from 50-150 mg per liter,with rising concentration of salicylic acid,water and photosynthesis pigment and efficency of photosynthesis of cucumber leaves increase, soluble sugar and protein rise.acativity of POD, SOD and CAT enhance,Proline accumulate fast,rising speed of MDA and Relative electrical conductivity slow. When treatment concentration of salicylic acid exceed 150mg per liter, with rising concentration of salicylic acid, the front seven physiological indication decline,the back two physiological indication rise. When treatment concentration of salicylic acid is 150mg per liter, water,chlorophyll a, chlorophyll b, Carrots vegetarian, efficency of photosynthesis, soluble sugar and protein, acativity of POD, SOD and CAT, Proline cucumber under water press all is the highest,they in turn are 94%,1121.63μg·g-1FW,456.20μg·g-1FW,426.44μg·g-1FW,1.92μmolO2·m-2·g-1,146.67mg·g-1DW,291.23mg·g-1DW,9900U·g-1,320U·g-1,332U·g-1,80μg·g-1FW. MDA and Relative electrical conductivity is the lowest,they in turn are 29μg·g-1,FW,28%. Physiological change above show optimum concentration of salicylic acid is 150 mg per litre. When concentration of salicylic acid is certain, inflence of trestment concentrationn of hormone NAA on above physiological and biochemical changes is a little,its optimum concentration is 0.6 mg per litre.2.Treatment concentration of betaine range from 100-300 mg per litre,with rising concentration of s betaine,water and photosynthesis pigment and efficency of photosynthesis of cucumber leaves increase, soluble sugar and protein rise.acativity of POD, SOD and CAT enhance,Proline accumulate fast,rising speed of MDA and Relative electrical conductivity slow. When treatment concentration of betaine exceed 300mg per litre, with rising concentration of betaine, the front seven physiological indication decline,the back two physiological indication rise. When treatment concentration of betaine is 300mg per litre,water,chlorophyll a, chlorophyll b, Carrots vegetarian, efficency of photosynthesis, soluble sugar and protein, acativity of POD, SOD and CAT, Proline cucumber under water press all is the highest,they in turn are 92%,1107.69μg·g-1FW,446.27μg·g-1FW,438.47μg·g-1FW,1.87μmolO2·m-2·g-1,142.7mg·g-1DW,283.7mg·g-1DW,9800U·g-1,320U·g-1,321U·g-1,72μg·g-1FW. MDA and Relative electrical conductivity is the lowest,they in turn are 34μg·g-1FW,38%. Physiological change above show optimum concentration of betaine is 300 mg per litre. When concentration of s betaine is certain, inflence of trestment concentrationn of hormone NAA on above physiological and biochemical changes is a little,its optimum concentration is o.6 mg per litre.3.Treatment concentration of CCC range from 100-300 mg per litre.with rising concentration of CCC,water and photosynthesis pigment and efficency of photosynthesis of cucumber leaves increase, soluble sugar and protein rise.acativity of POD, SOD and CAT enhance,Proline accumulate fast,rising speed of MDA and Relative electrical conductivity slow. When treatment concentration of CCC exceed 300mg per litre, with rising concentration of CCC, the front seven physiological indication decline,the back two physiological indication rise.When treatment concentration of CCC is 300mg per litre.water,chlorophyll a, chlorophyll b, Carrots vegetarian, efficency of photosynthesis, soluble sugar and protein, acativity of POD, SOD and CAT, Proline cucumber under water press all is the highest,they in turn are88%,1102.23μg·g-1FW.439.68μg·g-1FW,432.6μg·g-1FW,1.85μmolO2·m-2·g-1,144.3mg·g-1DW,285.9mg·g-1DW,9700U·g-1,310U·g-1,316U·g-1,65μg·g-1 FW. MDA and Relative electrical conductivity is the lowest,they in turn are 45μg·g-1FW,65%. Physiological change above show optimum concentration of CCC is 300 mg per litre. When concentration of s betaine is certain, inflence of trestment concentrationn of hormone NAA on above physiological and biochemical changes is a little,its optimum concentration is o.9mg per litre.4.Treatment concentration of PP333 range from 50-100 mg per litre,with rising concentration of PP333,water and photosynthesis pigment and efficency of photosynthesis of cucumber leaves increase, soluble sugar and protein rise,acativity of POD, SOD and CAT enhance,Proline accumulate fast,rising speed of MDA and Relative electrical conductivity slow. When treatment concentration of PP333 exceed 100mg per litre, with rising concentration of PP333, the front seven physiological indication decline.the back two physiological indication rise.When treatment concentration of PP333 is 100mg per litre, water content and photosynthesis pigment and efficency of photosynthesil a, chlorophyll b. Carrots vegetarian, efficency of photosynthesis, soluble sugar and protein, acativity of POD, SOD and CAT, Proline cucumber under water press all is the highest,they in turn are 90%,1115.69μg·g-1FW,456.27μg·g-1FW,424.47μg·g-1FW,1.89μmolO2·m-2·g-1,138.4mg·g-1DW,276.1mg·g-1DW,9900U·g-1,320U·g-1,322U·g-1,62μg·g-1FW. MDA and Relative electrical conductivity is the lowest,they in turn are 42μg·g-1FW,62%. Physiological change above show optimum concentration of PP333 is 100 mg per litre. When concentration of PP333 is certain, inflence of trestment concentration of hormone NAA on above physiological and biochemical changes is a little,its optimum concentration is o.9 mg per litre.. 5.While anti-drought target of cucumber leaf such as MDA,Proline and Relative electrical conductivity is tested after composite seed coating treatment,it is found that under moderate drought conditions effects of anti-drought of CCC and PP333 is better, in a highly drought conditions salicylic acid and betaine fight the drought more effectively...
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