Necrotrophs are Opportunistic, unspecialised (‘non-obligate’) pathogens and Host cells killed rapidly

Entry unspecialised via wounds or natural openings

Secrete copious cell-wall-degrading (lytic) enzymes and toxins

Appressoria/haustoria not normally produced

Wide host range

Easy to culture axenically

Survive as competitive saprotrophs

Controlled by jasmonate- and ethylene-dependent host-defence pathways

TLS Online TPP Program

#Id: 8129

#XL - Q Biochemistry

Some other biologically active isoprenoid compounds or derivatives.

TLS Online TPP Program

#Id: 8127

#XL - Q Biochemistry

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 

TLS Online TPP Program

#Id: 8126

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 8125

#XL - Q Biochemistry

Steroids derived from cholesterol.

TLS Online TPP Program

#Id: 8120

#XL - Q Biochemistry

Arachidonic acid and some eicosanoid derivatives.

TLS Online TPP Program

#Id: 8119

#XL - Q Biochemistry

The triterpenes are C30 terpenes and include squalene and lanosterol, two of the precursors of cholesterol