Development and evaluation of STS diagnostic marker to track turmeric (Curcuma longa L.) resistance against rhizome rot caused by Pythium aphanidermatum

2013 ◽  
Vol 43 (2) ◽  
pp. 167-175 ◽  
Author(s):  
Basudeba Kar ◽  
Sanghamitra Nayak ◽  
Raj Kumar Joshi
Keyword(s):  
Diagnostic Marker ◽  
Curcuma Longa ◽  
Pythium Aphanidermatum ◽  
Rhizome Rot

scholarly journals Effect of Chitosan on Rhizome Rot Disease of Turmeric Caused by Pythium aphanidermatum

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Sathiyanarayanan Anusuya ◽  
Muthukrishnan Sathiyabama
Keyword(s):  
Curcuma Longa ◽  
Foliar Spray ◽  
Pythium Aphanidermatum ◽  
Defense Enzymes ◽  
Crab Shell ◽  
Disease Symptoms ◽  
Spray Method ◽  
Rot Disease ◽  
Increased Activity ◽  
Rhizome Rot

Chitosan was evaluated for its potential to induce antifungal hydrolases in susceptible turmeric plant (Curcuma longa L.). Under field conditions, the application of chitosan (crab shell) to turmeric plants by foliar spray method induces defense enzymes such as chitinases and chitosanases. Such an increase in enzyme activity was enhanced by spraying chitosan (0.1% w/v) on leaves of turmeric plants at regular intervals. Gel electrophoresis revealed new chitinase and chitosanase isoforms in leaves of turmeric plants treated with chitosan. Treated turmeric plants showed increased resistance towards rhizome rot disease caused by Pythium aphanidermatum, whereas control plants expressed severe rhizome rot disease. Increased activity of defense enzymes in leaves of chitosan treated turmeric plants may play a role in restricting the development of disease symptoms. The eliciting properties of chitosan make chitosan a potential antifungal agent for the control of rhizome rot disease of turmeric.

Termitarium-inhabitingBacillus endophyticusTSH42 andBacillus cereusTSH77 colonizingCurcuma longaL.: isolation, characterization, and evaluation of their biocontrol and plant-growth-promoting activities

2016 ◽  
Vol 62 (10) ◽  
pp. 880-892 ◽  
Author(s):  
Ankit Kumar Chauhan ◽  
Dinesh Kumar Maheshwari ◽  
Kangmin Kim ◽  
Vivek K. Bajpai
Keyword(s):  
Antifungal Activity ◽  
Plant Growth ◽  
Curcuma Longa ◽  
Pathogenic Fungus ◽  
Mass Spectrometry Analysis ◽  
In Vitro Assays ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Rhizome Rot ◽  
Bacillus Strains

Bacillus strains were isolated from termitarium soil and screened for their antifungal activity through the production of diffusible and volatile metabolites. Further, the bacterial strains that showed antifungal activity were evaluated for their biocontrol potential on the basis of their plant-growth-promoting attributes. Termitarium-inhabiting Bacillus strains TSH42 and TSH77 significantly reduced the growth of pathogenic fungus Fusarium solani, controlled the symptoms of rhizome rot in turmeric (Curcuma longa L.), and demonstrated various plant-growth-promoting traits in different in vitro assays. On the basis of morphological, physiological, biochemical, and 16S rDNA characteristics, isolates TSH42 and TSH77 were identified as Bacillus endophyticus (KT379993) and Bacillus cereus (KT379994), respectively. Through liquid chromatography – mass spectrometry analysis, acidified cell-free culture filtrate (CFCF) of B. cereus TSH77 was shown to contain surfactin and fengycin, while CFCF of B. endophyticus TSH42 contained iturin in addition to surfactin and fengycin. Treatment of the turmeric (C. longa L.) plants with TSH42 and TSH77 significantly reduced the percentage incidence of rhizome rot disease caused by F. solani. The same treatment also increased the fresh rhizome biomass and plant growth in greenhouse conditions.

Sign in / Sign up

Export Citation Format

Share Document