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TLS Online TPP Program

#Id: 9788

Mutations in the EDS1 (SA synthesis) (ENHANCED DISEASE SENSITIVITY 1) gene eliminate race‐specific resistance mediated by the TIR‐NB‐LRR class of R proteins

#XL - R Botany #Plant Défense against Pathogen #Part B Pointers
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TLS Online TPP Program

#Id: 10677

#XL - R Botany

Cork Cambium

Another meristematic tissue called cork cambium or phellogen develops, usually in the cortex region
TLS Online TPP Program

#Id: 10678

#XL - R Botany

Cork Cambium

Phellogen cuts off cells on both sides. The outer cells differentiate into cork or phellem, while the inner cells differentiate into secondary cortex or phelloderm.

Phellogen, phellem, and phelloderm are collectively known as periderm
TLS Online TPP Program

#Id: 10679

#XL - R Botany

Secondary Growth in Roots

In the dicot root, the vascular cambium is completely secondary in origin.

It originates from the tissue located just below the phloem bundles, a portion of pericycle tissue
TLS Online TPP Program

#Id: 10680

#XL - R Botany
TLS Online TPP Program

#Id: 10681

#XL - R Botany
TLS Online TPP Program

#Id: 10682

#XL - R Botany

Anomalous secondary growth

Several dicotyledons show secondary growth that is different from normal  secondary growth. The deviating methods of secondary thickening are called  abnormal or anomalous secondary growth. 

e.g., Bougainvillea (Dicot)