Articles
Resistance of Brassica L. vegetable crops to Lepidoptera insects correlates to the content of biologically active substances
Article number
1384_44
Pages
339 – 346
Language
English
Abstract
In the context of widespread expansion of leaf-eating pests on Brassica crops with requirements of environmental protection, knowledge of botanical, ecological-geographical, and biochemical patterns of plant resistance to insects is necessary.
The purpose of the present work is to study the variability of the content of biologically active phenolic compounds, chlorophyll and carotenoid pigments and glucosinolates and the degree of Brassica vegetable crops resistance to the diamondback moth Plutella xylostella. The material included 100 Brassica rapa accessions, a representative part of the Russian (VIR) worldwide collection.
The study of the degree of resistance to damage by pests in natural and artificial conditions was carried out in three ecological zones of the Russian Federation: the Far North, North-West, and the Southern.
A high level of congruence between natural and artificial infection conditions was determined.
High variability of resistance of B. rapa crops to insects was observed from full susceptibility to resistance.
Sources of resistance to insects were identified among crops and types of cultivars, mainly among semi-headed cultivars of Chinese cabbage and Russian and Scandinavian cultivars of root turnip.
As a result of biochemical analysises, 12 glucosinolate compounds (aliphatic, aromatic and indole glucosinolates), 12 organic acids, 9 sugars, 11 phenolic compounds and 13 free amino acids were found, their quantitative and qualitative composition were determined, and the range of variation in concentration of these chemical compounds have been established.
Correlations between the content of the identified compounds and the resistance of crops to the diamondback moth have been established.
This research may reveal new patterns of plant-pest interaction.
The purpose of the present work is to study the variability of the content of biologically active phenolic compounds, chlorophyll and carotenoid pigments and glucosinolates and the degree of Brassica vegetable crops resistance to the diamondback moth Plutella xylostella. The material included 100 Brassica rapa accessions, a representative part of the Russian (VIR) worldwide collection.
The study of the degree of resistance to damage by pests in natural and artificial conditions was carried out in three ecological zones of the Russian Federation: the Far North, North-West, and the Southern.
A high level of congruence between natural and artificial infection conditions was determined.
High variability of resistance of B. rapa crops to insects was observed from full susceptibility to resistance.
Sources of resistance to insects were identified among crops and types of cultivars, mainly among semi-headed cultivars of Chinese cabbage and Russian and Scandinavian cultivars of root turnip.
As a result of biochemical analysises, 12 glucosinolate compounds (aliphatic, aromatic and indole glucosinolates), 12 organic acids, 9 sugars, 11 phenolic compounds and 13 free amino acids were found, their quantitative and qualitative composition were determined, and the range of variation in concentration of these chemical compounds have been established.
Correlations between the content of the identified compounds and the resistance of crops to the diamondback moth have been established.
This research may reveal new patterns of plant-pest interaction.
Authors
A.M. Artemeva, A.E. Solovieva, T.T. Ageeva, A.B. Kurina
Keywords
Brassica rapa, diamondback moth, resistance, chemical compounds
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