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Morphology, Ultrastructure, And Function Of Extrafloral Nectaries In Three Species Of Caesalpiniaceae, Lenore T. Durkee, Matthew H. Haber, Lisa Dorn, Ann Remington

Journal of the Iowa Academy of Science: JIAS

Light and electron microscopy reveal that the morphologically well-differentiated petiolar nectaries of Chamaecrista fasciculata, Senna hepecarpa, and S. marilandica have an unusually simple anatomy consisting of an epidermis immediately subtended by a mass of small, loosely-packed parenchyma cells. Vascular strands from the petiolar bundles enter the nectary and terminate as phloem within or near this parenchyma. In mature, secreting nectaries, the cuticle of the epidermis extends between the epidermal cells and into the nectary parenchyma, where it occupies, but does not occlude, much of the free space of this tissue. The cutin is not found below the level …