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Plant Physiol Biochem

Title:		Resource allocation in response to herbivory and gall formation in Linaria vulgaris
Author(s):		Zoric AS; Morina F; Tosevski I; Tosti T; Jovic J; Krstic O; Veljovic-Jovanovic S;
Address:		"Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia. Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia; Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Ceske Budejovice, Czech Republic. Electronic address: morina@umbr.cas.cz. CABI, Delemont, Switzerland; Institute for Plant Protection and Environment, Department of Plant Pests, Zemun, Serbia. University of Belgrade, Faculty of Chemistry, Belgrade, Serbia. Institute for Plant Protection and Environment, Department of Plant Pests, Zemun, Serbia"
Journal Title:		Plant Physiol Biochem
Year:		2019
Volume:		20181128
Issue:
Page Number:		224 - 232
DOI:		10.1016/j.plaphy.2018.11.032
ISSN/ISBN:		1873-2690 (Electronic) 0981-9428 (Linking)
Abstract:		"Trehalose and its precursor, trehalose 6-phosphate (T6P), are essential regulators of plant response to abiotic and biotic stress. Here we used the specific host-insect interaction between Linaria vulgaris (Plantaginaceae) and stem-galling weevil, Rhinusa pilosa (Mecinini, Curculionidae) with the aim to distinguish carbohydrate allocation patterns in response to herbivory, gall formation (G1, 24?ª+h after oviposition), and gall development (G2, 7 days after oviposition) under controlled conditions. The hypothesis is that herbivory and galling induce distinct responses in both leaves and stems, and that shifts in carbon allocations are regulated by signaling sugars. Systemic response to herbivory was accumulation of T6P and maltose. The main feature of G1 in the stems was accumulation of trehalose, accompanied by increased T6P, turanose and glucose content, oppositely to the leaves. In G2, galls had 3-folds higher weight than controls, with further accumulation of fructose, glucose, turanose, and total water-insoluble carbohydrates (TIC), while the sucrose/hexose ratio decreased. Analysis of fast chlorophyll fluorescence kinetic (OJIP) transients in G2 showed a slight decrease in quantum yield of electron transport flux from Q(A) to Q(B), and towards photosystem I acceptor side, correlated with the decreased content of photosynthetic pigments and hexoses accumulation. Redistribution of photosynthates, and accumulation of T6P were induced in response to herbivory, indicating its signaling role. The results support the hypothesis that R. pilosa can induce plant reprogramming towards the accumulation of beneficial carbohydrates in developing gall by mechanisms which include both T6P and trehalose"
Keywords:		Animals Chlorophyll/metabolism Fructose/metabolism Glucose/metabolism *Herbivory Linaria/*metabolism/parasitology Plant Leaves/metabolism/parasitology Plant Stems/metabolism/parasitology *Plant Tumors/parasitology Trehalose/metabolism Weevils Carbohydrate;
Notes:		"MedlineZoric, Ana Sedlarevic Morina, Filis Tosevski, Ivo Tosti, Tomislav Jovic, Jelena Krstic, Oliver Veljovic-Jovanovic, Sonja eng France 2018/12/24 Plant Physiol Biochem. 2019 Feb; 135:224-232. doi: 10.1016/j.plaphy.2018.11.032. Epub 2018 Nov 28"