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Biomedical subjects

A N Gupta

Publications and source records attributed to A N Gupta.

At least 73 records · Page 4Linked to original sources
PubMed1975

Intersex or sex reversal amongst plant parasitic nematodes.

The intersexuality amongst plant parasitic nematodes has been discussed to be an intermediate stage of sex reversal of male into female. We, hereby, suggest four possible reasons for the sex reversal, this being an intermediate stage - a so-called intersex phase: (1) gene mutation, (2) unusual numerical relationship between autosomes and sex chromosomes during fertilization, (3) effect of female sex hormone secreted by adult females alongwith the mating attractant, and (4) presence or absence of andrgenic hormone in males. The possible effect of female sex hormone on the synthesis of macromolecules which might play a role in sex reversal, is discussed in particular.

Animals↗
PubMed1975

Functional significance of non-specific esterase and its involvement in the excretory mechanism of trematodes, cestodes and nematodes.

The distribution of non-specific esterase in the excretory canals of nematodes, cestodes and trematodes is described. In all the cases the excretory canals are intensely positive, except in Dioecocestus fevita where the reaction is mild. In most of the cases the reaction is observed in the form of small granules, distributed throughout the canal. The distribution of the enzyme has been correlated with the excretory functions of these parasites.

Animals↗