They supposed that such mutant forms constituted new species and thus believed that natural selection was not necessary to account for the origin of species. The last influential mutationist was Richard Goldschmidt

TLS Online TPP Program

#Id: 9758

#XL - R Botany

Plant species produce cysteine protease, which disrupt the

peritrophic membrane that protects the gut epithelium of many insects.

TLS Online TPP Program

#Id: 9759

#XL - R Botany

Antidigestive proteins in plants are the proteinase inhibitors. Found in legumes, tomato, and other plants, these substances block the action of herbivore proteolytic enzymes

TLS Online TPP Program

#Id: 9760

#XL - R Botany

Many plants release a specific bouquet of volatile organic compounds when attacked by insect herbivores. These volatiles can consist of compounds from all major pathways for secondary metabolites including terpenoids (mono- and sesquiterpenes), alkaloids (indole), and phenylpropanes (methyl salicylate), as well as green-leaf volatiles. 

TLS Online TPP Program

#Id: 9761

#XL - R Botany

These VOCs are herbivore– induced plant volatiles (HIPV) HIPV and act as cues for natural enemies of the insect herbivore, for example parasitic wasps.

TLS Online TPP Program

#Id: 9762

#XL - R Botany

When maize plants were exposed to green-leaf volatiles (VOCs), JA and JA-related gene expression were rapidly induced.

TLS Online TPP Program

#Id: 9763

#XL - R Botany

To distinguish between “self” and “nonself” during pathogen infection, plants possess pattern recognition receptors (PRRs) that perceive microbe-associated molecular patterns (MAMPs) which are conserved among a specific class of microorganisms (such as chitin for fungi, flagella for bacteria) but are absent in the host.