Increased water salinity applied to tomato plants accelerates the development of the leaf miner Tuta absoluta through bottom-up effects.
Variation in resource inputs to plants may trigger bottom-up effects on herbivorous insects. We examined the effects of water input: optimal water vs. limited water; water salinity: with vs. without addition of 100 mM NaCl; and their interactions on tomato plants (Solanum lycopersicum), and consequently, the bottom-up effects on the tomato leaf miner, Tuta absoluta (Meytick) (Lepidoptera: Gelechiidae). Plant growth was significantly impeded by limited water input and NaCl addition. In terms of leaf chemical defense, the production of tomatidine significantly increased with limited water and NaCl addition, and a similar but non-significant trend was observed for the other glycoalkaloids. Tuta absoluta survival did not vary with the water and salinity treatments, but the treatment "optimal water-high salinity" increased the development rate without lowering pupal mass. Our results suggest that caution should be used in the IPM program against T. absoluta when irrigating tomato crops with saline water.
College of Plant Science &Technology, Huazhong Agricultural University, Wuhan 430070, China.|INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06903 Sophia-Antipolis, France.
Peng
P
Han
College of Plant Science &Technology, Huazhong Agricultural University, Wuhan 430070, China.
Zhi-Jian
ZJ
Wang
INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06903 Sophia-Antipolis, France.
Anne-Violette
AV
Lavoir
Institut de Chimie de Nice, Université Nice Sophia-Antipolis, UMR CNRS 7272, Parc Valrose, F-06108 Nice, France.
Thomas
T
Michel
INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06903 Sophia-Antipolis, France.
Aurélie
A
Seassau
College of Plant Science &Technology, Huazhong Agricultural University, Wuhan 430070, China.
Wen-Yan
WY
Zheng
College of Plant Science &Technology, Huazhong Agricultural University, Wuhan 430070, China.
Chang-Ying
CY
Niu
INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06903 Sophia-Antipolis, France.
Nicolas
N
Desneux
D057914:Agricultural Irrigation / Q000379:methods; D000818:Animals; D060434:Herbivory / Q000502:physiology; D006790:Host-Parasite Interactions; D007814:Larva / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D018551:Solanum lycopersicum / Q000254:growth & development / Q000378:metabolism / Q000469:parasitology*; D009036:Moths / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D054712:Salinity; D012965:Sodium Chloride / Q000494:pharmacology*; D014053:Tomatine / Q000031:analogs & derivatives / Q000378:metabolism; D014867:Water / Q000378:metabolism / Q000494:pharmacology*
D014867:Water; C003677:tomatidine; D014053:Tomatine; D012965:Sodium Chloride