Culture filtrate of Lasiodiplodia theobromae restricts the development of natural resistance in Brassica nigra plants.
Culture filtrate of Lasiodiplodia theobromae increased respiration rate, phenylalanine ammonia lyase activity, and levels of hydrogen peroxide, lipid peroxides and salicylic acid in B. nigra plants. Salicylic acid (SA) level increased for 1 hr of interaction and reduced later. Development of systemic acquired resistance (SAR) was found restricted in plants infected with L. theobromae due to deficiency of SA, which is a major signal for development of SAR. Exogenously supplied SA did develop resistance and plant death was delayed. It was hypothesized that deficiency of SA could be due to jasmonic acid produced by fungus that inhibits SA biosynthesis.
Post Graduate Department of Biosciences, Sardar Patel University, Vallabh Vidyanagar 388 120, India. vasu_thakkar@yahoo.com
Vasudev R
VR
Thakkar
R B
RB
Subramanian
I L
IL
Kothari
D001203:Ascomycota / Q000378:metabolism*; D001205:Ascorbic Acid / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D003517:Cyclopentanes / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism / Q000494:pharmacology; D007113:Immunity, Innate; D008054:Lipid Peroxides / Q000378:metabolism; D009149:Mustard Plant / Q000382:microbiology*; D009183:Mycotoxins / Q000378:metabolism; D054883:Oxylipins; D017382:Reactive Oxygen Species; D020156:Salicylic Acid / Q000378:metabolism; D013997:Time Factors
D003517:Cyclopentanes; D008054:Lipid Peroxides; D009183:Mycotoxins; D054883:Oxylipins; D017382:Reactive Oxygen Species; C011006:jasmonic acid; D006861:Hydrogen Peroxide; D020156:Salicylic Acid; D001205:Ascorbic Acid