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Preformed aerenchyma determines the differential tolerance response under partial submergence imposed by fresh and saline water flooding in rice

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Title Preformed aerenchyma determines the differential tolerance response under partial submergence imposed by fresh and saline water flooding in rice
Not Available
 
Creator K. Chakraborty
S. Ray
J. Vijayan
K. A. Molla
R. Nagar
P. Jena
S. Mondal
B. B. Panda
B.P. Shaw
P. Swain
K. Chattopadhyay
R.K. Sarkar
 
Subject Submergence
Saline water
Flooding
 
Description Not Available
Plant's response to fresh- and saline-water flooding and the resulting partial submergence,
seems different due to the added complexities of element toxicity of salinity. We identified
a few rice genotypes which can tolerate combined stresses of partial submergence and
salinity during saline water flooding. To gain mechanistic insights, we compared two rice
genotypes: Varshadhan (freshwater-flooding tolerant) and Rashpanjor (both fresh- and
saline-water flooding tolerant). We found greater ethylene production and increased “respi ratory burst oxidase homolog” (RBOH)-mediated reactive oxygen species (ROS) production
led to well-developed constitutive aerenchyma formation in Rashpanjor, which makes it
preadapted to withstand fresh- and saline-water flooding. On the contrary, an induced aer enchyma formation-dependent tolerance mechanism of Varshadhan worked well for fresh water flooding but failed to provide tolerance to saline-water flooding. Additional salt stress
was found to significantly inhibit the induced aerenchyma formation process due to the
dampening of ROS signaling by the action of metallothionein in Varshadhan. Besides, incon spicuous changes in ionic regulation processes in these two genotypes under saline-water
flooding suggest preadapted constitutive aerenchyma formation plays a more significant
role than elemental toxicity per se in tolerating combined stresses encountered during
saline water flooding in rice. Overall, our study indicated that well-developed constitutive
aerenchyma provide an adaptive advantage during partial submergence due to saline water
flooding in rice as the key process of induced aerenchyma formation is hampered in the
presence of salinity stress coupled with partial submergence
Not Available
 
Date 2022-03-25T05:36:42Z
2022-03-25T05:36:42Z
2021-08-25
 
Type Research Paper
 
Identifier Chakraborty K, Ray S, Vijayan J, Molla KA, Nagar R, Jena P, Mondal S, Panda BB, Shaw BP, Swain P, Chattopadhyay K, Sarkar RK(2021)Preformed aerenchyma determines the differential tolerance response under partial submergence imposed by fresh and saline water flooding in rice. Physiologia Plantarum 173: 1597–1615
1399-3054
http://krishi.icar.gov.in/jspui/handle/123456789/70564
 
Language English
 
Relation Not Available;
 
Publisher Wiley