mesophyll


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Related to mesophyll: spongy mesophyll
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Fig. 218 Mesophyll . Transverse section of a dorsiventral leaf.

mesophyll

the internal tissue of a plant leaf, except the VASCULAR BUNDLES. In dorsiventral leaves the mesophyll is differentiated into an upper palisade mesophyll and a loosely packed, lower spongy mesophyll. In isobilateral leaves there are upper and lower palisade mesophylls and a central spongy area. In C4 PLANTS there is yet another arrangement called KRANZ ANATOMY. All mesophyll cells contain CHLOROPLASTS (for PHOTOSYNTHESIS) which lie close to the edge of the cell in order to gain maximum light and gas supply. Mesophyll tissue contains numerous intercellular spaces which communicate with the atmosphere outside the leaf via STOMATA. See Fig. 218 .
References in periodicals archive ?
1980) Direct evidence for cytodifferentiation to tracheary elements without intervening mitosis in a culture of single cells isolated from the mesophyll of Zinnia elegans.
It was concluded that leaf spots symptoms were appeared due to infected mesophyll tissues.
The mesophyll of the leaf base is similar to that found in the base of the spine (Figs.
Mechanical tissue is undeveloped, resulting from underdeveloped mesophyll tissue.
After anthesis, the ovary presents uniseriate outer epidermis and mesophyll with three tissue regions: 1) An outer parenchymatous region, with thin-walled cells that vary in size and shape, and may present druses; 2) A middle region that originates from the middle meristem and consists of elongated cells that are oriented obliquely or transversely to the longitudinal axis of the ovary; and 3) An inner region that is uniseriate and has short palisade-like cells.
Localization of phytoalexins in fluorescent mesophyll cells isolated from bacterial blight-infected cotton cotyledons and separated from other cells by fluorescence-activated cell sorting.
They found that in young leaves, ZNT1 mRNA was abundant in the bundle sheath of the veins, adjacent mesophyll cells, and guard cells of the epidermis.
VULGARIS (COMMON BEAN) LEAF MESOPHYLL Department of
The serrations of juvenile Ulmus leaves have been reported to have well-developed spongy mesophyll, making them potentially capable of gas exchange long before the medial portions of the leaf (Billings 1905).
Drought response of mesophyll conductance in forest understory species--impacts on water-use efficiency and interactions with leaf water movement.