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The asker opted for community grading. The question was closed on 2016-12-22 09:54:07 based on peer agreement (or, if there were too few peer comments, asker preference.)
English to Farsi (Persian) translations [PRO] Botany
English term or phrase:voucher
Fruit anatomy was studied by free-hand sectioning of mature and dried fruit
samples which had been boiled in water for 3–5 seconds. They were then stained with
Carmine, for cellulose in the phloem, and diluted methyl green, for ligniﬁed cells
in the xylem. Permanent slides as vouchers were prepared by dehydrating and
mounting on microscopic slides in Canada balsam .