Abstract
As an extension of earlier studies performed in our laboratory on enzyme localization on tissue level, the distribution of starch was examined in seedling root tips of peaPisum sativum L., broad beanFaba vulgaris Moench., maizeZea mays L., lupinLupinus albus L., and pumpkinCucurbita maxima Duch., and in tips of adventive roots of onionAllium cepa L. by means of the alcian blue /JJK procedure applied to paraffin sections. In pea, some genetic (various cultivars) and eco-physiological (different harvests, various localities, diverse way of germination, uneven seedling age, unequal stage of cell growth) factors were studied concerning the present problem. In all these cases the starch localization pattern remains constant though the amounts of starch vary in particular cell complexes. From the evaluation of the starch localization at the level of the beginning cell growth in particular species and from comparison of the findings in different species it follows that starch localization and histogenesis patterns are different. This supports the view that the two phenomena are caused or controlled by uneven factors.
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As mostly accepted (and in accordance with our previous papers), the term starch is understood here as a group name for polyglucosan complexes containing also some other substances, appearing in plant cells as characteristic particles, starch grains (starch granules): the polysaccharide material considerably dominates the mass of the initial plastid.
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Beneš, K., Kutík, J. The localization of starch in root tips. Biol Plant 20, 458–463 (1978). https://doi.org/10.1007/BF02923351
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DOI: https://doi.org/10.1007/BF02923351