科研之友
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摘要
Two relatively new key species in Louisiana, USA that conform to the plant stress hypothesis are the Mexican rice borer, Eoreuma loftini (Dyar) and the sugarcane aphid, Melanaphis sacchari (Zehntner). High performance liquid chromatography differentiated insect resistant and susceptible sugarcane cultivars based on nutritional profiles involving free amino acids (FAAs). For E. loftini susceptible cultivar LCP 85-384, concentrations of essential and nonessential FAAs in whole leaf tissue samples were more than twice as high as in the resistant cultivar HoCP 85-845. Similarly, M. sacchari susceptible L 97-128 exhibited more than three fold higher concentrations of essential FAAs in the phloem sap compared to the resistant cultivar, HoCP 91-555. Two essential FAAs, histidine and arginine, were detected only in the sap of L 97-128. A novel approach to evaluate insect resistant and susceptible cultivars is proposed.
- 出版日期2011-3
