Good day, I've been looking for protocols that would help me in determining the changes in chlorophyll content of rice as it develops.
I've found this simple method using DMSO, and I wonder if there is any other simple way of knowing the chlorophyll a and b, and carotenoid of rice
Below is the sample protocol:
Extraction and Determination of Chlorophyll
Take frozen plant (leaf) tissue (100 mg)
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Place in 12 mL vial containing 7 mL DMSO
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Incubate at 65°C for 30 mm
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Transfer the sample to a 25 mL graduated tube
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Bring the volume to 10 mL with DMSO (dimethyl suiphoxide)
(Note: calculate the volume based on tissue wt.)
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Essay immediately or transfer to a vial and store between 0-4°C until analysis
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Transfer 1 mL to a cuvette
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Calibrate spectrophotometer against DMSO at 645 and 663 nm (Chl method)
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Record absorbance at 645 and 663 nm
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Calculate the chlorophyll content using Arnon’s equation
Arnon’s (1949) equations:
Chla (g l-1) = 0.0127 × A663 – 0.00269 × A645;
Chlb (g l-1) = 0.0229 × A645 – 0.00468 × A663;
Tot Chl (g l-1) = 0.0202× A645 + 0.00802 × A663.
References: Hiscox, J.D., and Tsraelstam, G.F. 1979. A method for the extraction of chlorophyll from leaf
tissue without maceration. Can. J. Bot. 57: 1332-1334.