This is a preview. Log in through your library . Abstract The secondary phloem of apple consists of sieve-tube elements, companion cells, phloem parenchyma cells, fiber-sclereids, and ray parenchyma ...
This is a preview. Log in through your library . Abstract Light microscopic studies of the petioles of Lagenaria siceraria reveal that the external phloem of each bicollateral vascular bundle develops ...
Figure 1: Model of protein/ribonucleoprotein transport through the microchannels of higher plant plasmodesmata. Figure 2: The plant vascular network and the development of the phloem sieve-tube system ...
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