• R Andal

      Articles written in Proceedings – Plant Sciences

    • Stomatal chloroplast number in diploids and polyploids ofGossypium

      R Krishnaswami R Andal

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      Stomatal chloroplast count technique as a tool to identify the ploidy status was evaluated in species, hybrids and polyploids (natural and induced) involving the A, B and D genomes inGossypium. The differences between group means were significant. Intra group differences were significant for diploids and hexaploids but this was not due to the genomes involved. Thus some varieties of diploids,G. arboreum (A2) were on par withG. raimondii (D5). The percentage increase in chloroplast number per stoma was 25 for triploids, 72 for tetraploids and 102 for hexaploids taking the diploid number as the base. Ploidyper se had great impact on chloroplast number. It appears that stomatal chloroplast count technique can be used as a rapid method to identify polyploids in the genusGossypium.

    • Variations in foliar anatomy of cotton

      J G Bhatt R Andal

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      The presence of an additional lower palisade in varieties ofGossypium arboreum andG. herbaceum was confirmed. Except vars. Sujata and PSH, in other varieties ofG. barbadense spongy tissue was thicker than palisade. InG. hirsutum, varieties grown under irrigated and assured rainfall conditions had thicker upper epidermis and the differences in thickness of palisade and spongy tissues per genotype were less than those found in varieties growing under limited supply of moisture. It appeared that greater difference of palisademinus spongy parenchyma inG. hirsutum cottons is a better indicator of drought tolerance than palisade thickness alone or total thickness of the leaf.

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