Modification of root

Storage roots

Epiphytic or Aerial absorbing Roots e.g., Orchids.

Assimilatory roots

Respiratory roots or pneumatophores

Sucking roots or haustoria

Storage roots

Tap roots of carrot, radish, turnip and adventitious roots of sweet potato, dahlia get swollen and store food

TLS Online TPP Program

#Id: 9839

#XL - R Botany

TLS Online TPP Program

#Id: 9840

#XL - R Botany

Plant phytochrome is an autophosphorylating

serine/threonine kinase that may phosphorylate

other proteins

TLS Online TPP Program

#Id: 9841

#XL - R Botany

Three distinct classes of photoreceptors mediate the effects of UV-A/blue light (320–500 nm): the cryptochromes, phototropins and the ZEITLUPE (ZTL) family of proteins

TLS Online TPP Program

#Id: 9842

#XL - R Botany

Cryptochromes under blue light causes

1.Suppression of hypocotyl elongation

2.Promotion of cotyledon expansion

3.Membrane depolarization

4.Inhibition of petiole elongation

5.Anthocyanin production

6.Circadian clock entrainment

TLS Online TPP Program

#Id: 9843

#XL - R Botany

The HY4 gene encodes a 75-kDa cry1 protein with significant sequence homology to microbial DNA photolyase

TLS Online TPP Program

#Id: 9844

#XL - R Botany

Cryptochromes bind a (FAD) and the pterin 5,10 methyltetrahydrofolate (MTHF) as chromophores