Assimilates balance and rates of photosynthesis of spring barley and faba bean cultivars differing in tolerance towards aphids
1993
Kral, G. (Hannover Univ. (Germany). Inst. fuer Pflanzenkrankheiten und Pflanzenschutz) | Boehnke, B. | Schoenbeck, F.
Spring barley cultivar 'Carina' was classed as tolerant, cv. 'Ultra' as vulnerable towards infestation with Rhopalosiphum padi. These differences in tolerance did, however, not exist towards infestation with Metopolophium dirhodum. Faba bean cv. 'Apollo' was classed as tolerant and 'Albatross' as vulnerable towards Aphis fabae. Tolerance was correlated with lower assimilate deprivation by Rhopalosiphum padi and less decreased CO2-assimilation rates. After infestation with Metopolophium dirhodum CO2-assimilation rates were not influenced in cultivar specific ways at equal rates of assimilate deprivations. Also, Aphis fabae deprivated more assimilates on the vulnerable cv. 'Albatross' in comparison to the tolerant cv. 'Apollo'. Simultaneously, for the tolerant cultivar the supply of inflorescences with assimilates after the infestation was even better than for none infested one. This surely contributed to a stabilization of yield in the tolerant cultivar
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