Photosynthetic response of soybean to twospotted spider mite (Acari: Tetranychydae) injury

Abstract

ABSTRACT

Phytohormone content variation manipulated by Bemisia tabaci participated in inhibiting tobacco growth: Gibberellin may play a crucial role

“…Phloem-feeding insects feed on plant phloem using their stylets, this process may damage the photosynthetic system of the host plant leaves (Bueno et al, 2009). In this research, MEAM1 infestation caused a significant reduction in chlorophyll content, photosynthetic rate, stomatal conductance, and transpiration rate of tobacco upper leaf.…”

“…Studies have proved that herbivores feeding can impair the function of chloroplasts and stoma thereby affect photosynthesis (Cheng et al, 2018). For instance, when Tetranychus urticae feed on soybean (Glycine max L.), significant photosynthetic rate reduction is observed due to stomatal limitation (Bueno et al, 2009). Aphid (Brevicoryne brassicae L.) feeding causes obviously decrease in chlorophyll index, photosynthetic rate and stomatal conductance of Brassica carinata, thus resulting in a significant reduction in crop growth and yield (Pandey et al, 2013;Su et al, 2017).…”

Different population densities and continuous feeding byOligonychus yothersi(McGregor) (Acari: Tetranychidae) affect the emissions of herbivore-induced plant volatiles on avocado (Persea americanaMill. cv. Hass) shoots under semi-field conditions

“…In the same way, higher emissions of (E)-β-ocimene and (E)-DMNT were collected from lima bean plants with a high T. urticae-infestation level (Horiuchi et al 2003;De Boer et al 2004); also, Maeda and Takabayashi (2001) reported that the emissions of HIPVs released by mite-infested kidney bean plants increased with the T. urticae population growth after fourteen days of continuous infestation, suggesting that HIPVs' emissions are proportional to the mitepopulation density. In addition, the damaged foliar area increased with each O. yothersi-infestation level due to cumulative damage on the infested avocado leaves (Table 2); although the physiological parameters were not measured, it seems O. yothersi-feeding could have affected chlorophyll contents, stomatal conductance and photosynthetic rate (Reddall et al 2004;Bueno et al 2009;Hoy 2011;Gangopadhyay et al 2014). High levels of damage in the form of reddish colour and discolorations were observed on mite-infested avocado leaves by the loss of chlorophyll in response to O. yothersi-feeding (piercing-sucking), which caused high oxidative stress on leaves, which, in turn, emitted higher amounts of (E)-β-ocimene, α-farnesene and farnesyl cyanide, since it is known that monoterpenes and sesquiterpenes are essential to repair the photosynthetic apparatus and antioxidant activities (Fineschi and Loreto 2012;Holopainen and Blande 2013).…”

Continued foliar herbivory by the red spider mite Tetranychus macfarlenei on Plumbago zeylanica severely reduces the levels of a medicinally important metabolite in the roots

“…Free radical-mediated peroxidation of membrane lipid would be the cause of increased electrolyte leakage (Sivritepe et al 2009). Destruction of chloroplast directly affects CO 2 assimilation (Haile & Higley 2003;Bueno et al 2009). Decrease in CO 2 assimilation lowered the carbohydrate accumulation and consequent retroinhibition can be eliminated, since the mites continuously suck plant sap, thus preventing the leaves from storing carbohydrates (Patil & Nandihalli 2008;Sivritepe et al 2009).…”