Rights statement: This is a pre-print of an article published in New Phytologist, 193 (3), 2012. (c) Wiley.
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Treating seeds with activators of plant defence generates long-lasting priming of resistance to pests and pathogens.
AU - Worrall, Dawn
AU - Holroyd, Geoff H.
AU - Moore, Jason P.
AU - Glowacz, Marcin
AU - Croft, Patricia
AU - Taylor, Jane E.
AU - Paul, Nigel D.
AU - Roberts, Michael R.
N1 - This is a pre-print of an article published in New Phytologist, 193 (3), 2012. (c) Wiley.
PY - 2012/2
Y1 - 2012/2
N2 - Priming of defence is a strategy employed by plants exposed to stress to enhance resistance against future stress episodes with minimal associated costs on growth. Here, we test the hypothesis that application of priming agents to seeds can result in plants with primed defences.We measured resistance to arthropod herbivores and disease in tomato (Solanum lycopersicum) plants grown from seed treated with jasmonic acid (JA) and/or beta-aminobutryric acid (BABA).Plants grown from JA-treated seed showed increased resistance against herbivory by spider mites, caterpillars and aphids, and against the necrotrophic fungal pathogen, Botrytis cinerea. BABA seed treatment provided primed defence against powdery mildew disease caused by the biotrophic fungal pathogen, Oidium neolycopersici. Priming responses were long-lasting, with significant increases in resistance sustained in plants grown from treated seed for at least eight weeks, and were associated with enhanced defence gene expression during pathogen attack. There was no significant antagonism between different forms of defence in plants grown from seeds treated with a combination of JA and BABA.Long-term defence priming by seed treatments was not accompanied by reductions in growth, and may therefore be suitable for commercial exploitation.
AB - Priming of defence is a strategy employed by plants exposed to stress to enhance resistance against future stress episodes with minimal associated costs on growth. Here, we test the hypothesis that application of priming agents to seeds can result in plants with primed defences.We measured resistance to arthropod herbivores and disease in tomato (Solanum lycopersicum) plants grown from seed treated with jasmonic acid (JA) and/or beta-aminobutryric acid (BABA).Plants grown from JA-treated seed showed increased resistance against herbivory by spider mites, caterpillars and aphids, and against the necrotrophic fungal pathogen, Botrytis cinerea. BABA seed treatment provided primed defence against powdery mildew disease caused by the biotrophic fungal pathogen, Oidium neolycopersici. Priming responses were long-lasting, with significant increases in resistance sustained in plants grown from treated seed for at least eight weeks, and were associated with enhanced defence gene expression during pathogen attack. There was no significant antagonism between different forms of defence in plants grown from seeds treated with a combination of JA and BABA.Long-term defence priming by seed treatments was not accompanied by reductions in growth, and may therefore be suitable for commercial exploitation.
KW - herbivore
KW - pathogen
KW - defence
KW - jasmonic acid
KW - beta-aminobutyric acid
KW - seeds
U2 - 10.1111/j.1469-8137.2011.03987.x
DO - 10.1111/j.1469-8137.2011.03987.x
M3 - Journal article
AN - SCOPUS:84855760430
VL - 193
SP - 770
EP - 778
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 3
ER -