Some other leafhopper groups, such as the subfamily Typhlocybinae that feeds on more nutritious parenchyma plant tissues, appear to have lost their symbionts entirely (Buchner 1965; Moran et al. 2005).
However, herbivores can overcome PIs by producing insensitive or desensitized proteases, inactivating or degrading PIs, eating more plant tissue, and eating more nutritious young tissue (Winterer and Bergelson, 2001; Steppuhn and Baldwin, 2007; Zavala et al., 2008).
Compared with other insect herbivores feeding on the same host plant, gall-inducing insects feed on plant tissue that is more nutritious and less defended, and they do so in a favorable microhabitat that may also provide some protection from natural enemies.
The ant-fungus mutualism is thus facing similar selection pressures as necrotrophic fungi, that is, to breach the cell walls of living plant tissues to gain access to the nutritious interior of these cells.
Get nutritious food to supply the needs of growing tissues.
Avocado, as a basal angiosperm with highly nutritious fruit that is rich in oleic acid in its nonseed tissue, serves as an elegant system for comparing TAG biosynthesis functions among oil-rich tissues of diverse angiosperms.
But the meat-fakers say they are on the verge of a breakthrough, that there is a real possibility that a new era of fake meat – nutritious, cheap and indistinguishable from the real thing, made either of synthesised animal tissue or derived from plant material – may be upon us.
For its part, the fungus extracts nutrients from the tree tissue that the beetle could not, then presents a portion of it as nutritious morsels for beetle larvae to gobble.
Hence, increasing the concentration of bioavailable micronutrients in edible crop tissues (biofortification) has become a promising strategy in modern agriculture, allowing the access of more nutritious foods, to more people, with the use of fewer resources.
