endodermis


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endodermis

a one-cell layer of tissue found outside the vascular areas in many ANGIOSPERMS, which is particularly important in the roots where endodermal cells are thickened with CASPARIAN STRIPS for control of water transport. Water and salts have to pass through the endodermal cells which act as a kind of valve.
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root in control group (2A) and after treatment of seeds with aqueous extracts of very young leaves at concentrations of 1%, 3% and 5%(2B, 2C, 2D) Rh: Root hair, Ep: Epidermis, P: Parenchyma, En: Endodermis, Pc: Peripheral cycle, Xy: Xylem, Ph: Phloem, Pi: Pith.
The presence of common characters such as monostratified epidermis that is rapidly replaced by the exodermis, presence of secretory cavities associated to the endodermis and the secretory nature of endodermis, were detected.
The hypocotyl cortex (Figure 2D and E) shows parenchyma and eventually collenchyma; there is no endodermis with Casparian strips.
Entre los caracteres estudiados relacionados con los ejes es destacable la constancia en la estructura vascular de las costas, diferente de la de otros grupos de especies afines (datos no publicados), constituida por un haz con xilema en V de brazos divergentes, rodeado por una endodermis y asociado con tejido esclerosado que forma una vaina perivascular que alcanza su mayor desarrollo (haces trabados adaxial-abaxialmente) en especies que crecen entre 1 200 y mas de 3 000m (paramos, bosques frios, bosques montanos tropicales) como B.
In most of the aquatic macrophytes studied here, the inner cortex of the roots is derivatives from the meristematic endodermis (Lima and Menezes, 2008; Menezes et al.
There are no transfer cells when the endodermis is mature.
Dickison W, Weitzman A (1996) Comparative anatomy of the young stem, node, and leaf of Bonnetiaceae, including observation on a foliar endodermis.
2000) y los caracteres de las raices (Kato 1983), se situan, con el resto de los helechos, en las Monilophyta, un grupo de reciente concepcion y aun en revision, basado en las Moniliformopses, nombre originalmente propuesto por Kenrick & Crane (1997) que se fundamenta en caracteres morfologicos tales como la presencia de raices caulogenas originadas en la endodermis, protoxilema mesarco, tapete plasmodial, espermatozoides pluriflagelados y caracteres geneticos, como la insercion de nueve nucleotidos en el gen plastidico rps4.
Reported data by the authors also provide support to the hypothesis that endodermis differentiation may be stimulated limiting Al accumulation/allocation in roots of the tolerant wheat landrace.
The mechanical role of the endodermis in Equisetum plant stems.
of silica deposits in the endodermis of the seminal roots of Sorghum
En el interior de cada vaina se desarrolla la endodermis (e) formada por una capa de celulas (Fig.