Agriculture Reference
In-Depth Information
According to Mahajan and Tuteja (2005) the mechanism of
receptor sensor mediated signaling for transcription may be
as follows:
Stress
a
2+
ext
Receptors
PLC
PLC-Phospholipase C P
1
P
2
1P
3
+DAG
1P
3
- Inositol 1,4,5, Phosphate
DAG -Diacylglyeerol Ca
2+
PP
2
- Phospholidylinositol -
4, 5 - bisphosphae and other second messengers (Ins P, ROS)
Ca
2+
sensors (CBL'S/Cam)
Kinases / phosphatases (C
1
PK
S
, SOS
2
, CDPK
s
, MAPKS and various protein
phosphatase)
∼ PO
4
/ de ∼ PO
4
Transcription factors
Major stress responsive genes
Physiological response
Delayed genes
B. Stress responsive
Early genes
Encodes protein
like transcription
factors calcium
sensors
↑
Activate
→ modulate
Stress tolerance effectors e.g.
LEA like proteins, antioxidants
os
olytic synthesizing enzymes
