Abstract
Ancymidol foliar spray at 132 mg·liter−1 a.i. modified leaf anatomy of developing Helianthus annuus L. ‘Mammoth Russian’ leaves, but not of mature leaves. Ancymidol was effective in retarding plant growth when applied at the young seedling or at a more mature stage of growth. Ancymidol increased leaf weight per unit area and chlorophyll content on an area and unit weight basis, regardless of stage of leaf development. Total chlorophyll per leaf was also increased in mature leaves. Thus, darker green foliage due to increased chlorophyll content and modified leaf anatomy responses were determined to be independent effects.
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Texas Agricultural Experiment Station paper no. 22927.
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Starman, T.W., Kelly, J.W. & Pemberton, H.B. The influence of ancymidol on morphology, anatomy, and chlorophyll levels in developing and mature Helianthus annuus leaves. Plant Growth Regul 9, 193–200 (1990). https://doi.org/10.1007/BF00045282
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DOI: https://doi.org/10.1007/BF00045282