Principal Response Curves analysis of polyphenol variation in resistant and susceptible cotton after infection by a root-knot nematode (RKN) |
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| Institution: | 1. Escola de Agronomia, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil;2. Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil;3. Instituto de Matemática e Estatística, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil;1. Universidade Federal de Goiás (UFG), School of Agronomy/Forestry Sector, 74.690-900, Goiânia, GO, Brazil;2. Universidade Federal de Viçosa (UFV), Department of Forestry, 36.570-900, Viçosa, MG, Brazil;3. Souza Cruz S.A., Av. General Plínio Tourinho, 83880-000, Bom Jesus, Rio Negro, PR, Brazil;4. Universidade Federal de Viçosa (UFV), Department of Plant Science, 36.570-900, Viçosa, MG, Brazil;5. Celulose Nipo Brasileira (CENIBRA S.A.), Harvest and Transport Sector, 35.196-000, Belo Oriente, MG, Brazil;6. Empresa Brasileira de Pesquisa Agropecuária, Embrapa Florestas, 83.411-000, Colombo, PR, Brazil;1. Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK;2. Nottingham City Hospital, Nottingham University Hospitals NHS Trust, Nottingham, UK;1. University of Tromsø, Department of Arctic and Marine Biology, Dramsveien 201, 9037 Tromsø, Norway;2. Norwegian Institute for Nature Research, Fram Centre, N-9296 Tromsø, Norway;1. Department of Chemistry, University of Louisiana, Lafayette, LA 70504, USA;2. Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19128, USA;3. School of Chemistry, University of Bristol, Bristol BS8 1TS, UK |
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| Abstract: | The root-knot nematode (RKN), Meloidogyne incognita, attacks cotton root system. This study aimed to compare the induction of phenolic compounds over time in two cotton genotypes, resistant (TX-25) and susceptible (FM966), by RKN. Chemical profiles of cotton roots were obtained by HPLC, NMR, and colorimetric methods at four different time intervals. The Principal Response Curves analysis, a time-dependent, multivariate method, showed consistent variability over time in the profile of phenolic compounds between treatments for both genotypes. The variables that most contributed to the divergence between damaged and undamaged cotton roots were dimethoxylated and non-methoxylated gossypols, total flavonoids, and total phenols. |
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| Keywords: | Principal Response Curves Cotton resistance Gossypol |
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