Advances in research of induced resistance to insects in cotton

Abstract

Any change in a plant that occurs following herbivory or environmental factors is an induced response. These changes include phytochemical induction, increases in physical defenses, emission of volatiles that attract predators and parasitoids of herbivores, and reduction in plant nutritional quality for herbivores, which is termed induced resistance. Induced resistance has been demonstrated ubiquitously in plants. It is one of our goals to review what is known about the induced resistance to herbivorous insects in cotton, including three resistance secondary metabolites (terpenoid, tannin, and flavonoids) that are contained at any significant levels of resistance to herbivorous insects in cotton cultivates. In many cases, the quantities or quality of secondary metabolites in plant are changed after attacked by insects. This review focuses on induced plant resistance as quantitative or qualitative enhancement of defense mechanism against insect pests, especially on the abiotic-elicitors-induced resistance in cotton plants. The abiotic-elicitor of cupric chloride, an exogenous inorganic compound, may induce the secondary metabolites accumulation and is referred to as a copperinducible elicitor (CIE). Finally, we discuss how copperinducible elicitor may be used in the Integrated Pest Management (IPM) system for cotton resistance control.

Effect of some insecticides alone and in combination with salicylic acid against aphid, Aphis gossypii, and whitefly Bemisia tabaci on the cotton field

“…Moreover, Villada et al, (2009) observed rapid accumulation of callose deposits, phenol, and lignin synthesis after aphid infestation on resistance melon type. In addition, our results showed that the tested insecticides significantly increased the leaf phenolic content, which may be because any change in a plant that occurs following herbivory or environmental factors is an induced response (Ti and Zhang 2009). Exposure of tobacco plants Nicotiana tabacum to soil application with Bensulfuron-methyl (BSM) herbicide increased jasmonic acid (JA) and SA concentrations and increased plant resistance to whiteflies (B. tabaci) and aphids (M. persicae) with the activation of resistance genes (Li et al, 2016).…”

Demographic Performance of Helicoverpa zea Populations on Dual and Triple-Gene Bt Cotton

“…Cotton plants are rich in terpenoid compounds, which may function as a barrier against herbivores impairing growth/development and/or behavioral traits. However, the cotton plant has been modified during domestication and breeding for high yield and quality, including low gossypol oil in cottonseeds, which may have lessened the content of anti-herbivory secondary metabolites (such as gossypol) [36][37][38]. Information on secondary compounds in the cotton cultivars used in the present study was not available.…”

Depressed performance and detoxification enzyme activities of Helicoverpa armigera fed with conventional cotton foliage subjected to methyl jasmonate exposure

“…Cotton [ Gossypium hirsutum L. (Malvaceae)], a major host plant for H. armigera , is widely cultivated in China to the extent of around five million ha in 2011 (Zhu et al, ). This plant species has three categories of secondary metabolites, i.e., terpenoids, tannins, and flavones, that protect against herbivorous insects and other organisms (Ti & Zhang, ). The terpenoid gossypol, a typical plant allelochemical in Malvacea plants, is toxic to many lepidopteran larvae including H. armigera , Helicoverpa zea (Boddie), and Helicoverpa virescens (Fabricius) (Wang, ; Liu et al, ).…”