ÃÞ »¨ ѧ ±¨ Cotton Science 2010£¬22£¨2£©£º120-124
Effects of Protein Elicitor from Alternaria tenuissima on the Enzymatic Protection System in Cotton Leaves Abstract: The protein elicitor from Alternaria tenuissima (PEAT) was previously shown to be an efficient elicitor of induced systematic resistance in several crops. The role of crude extracts of PEAT on enzymatic protection system in cotton leaves by foliar spraying was investigated in growth and development periods of the Hunan Hybrid Cotton 3. Results showed that the activity of POD, SOD, SR and the ratio of C/N increased significantly when PEAT was sprayed on cotton leaves. However, the activity of MDA decreased significantly at the same time. It was speculated that PEAT might affect the redox of microenvironment in cotton leaves. PEAT might elicit the enzymatic protection system and activate the defensive system and growth system. Resistance to disease and pests might be induced and the growth and development might be accelerated in cotton sequentially.
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