Effect of shade on xylem development of moringa oleifera (alrawag) seedlings
2011
Ahmed, L.T., University of Khartoum, Khartoum (Sudan). Faculty of Forestry, Dept. of Silviculture | Abdel-Gadir, A.Y., University of Khartoum, Khartoum (Sudan). Faculty of Forestry, Dept. of Silviculture | Mahmmoud, A.E., University of Khartoum, Khartoum (Sudan). Faculty of Forestry, Dept. of Products and Industries | Warrag, E.I., University of Khartoum, Khartoum (Sudan). Faculty of Forestry, Dept. of Silviculture
This study investigated the effect of shade as a moderator of light intensity and temperature on xylem development of seedlings of Moringa oleifera. Three levels of shade were used: high shade, medium shade and no shade. Four sequential harvests were carried out monthly for the seedlings starting from four weeks after seed sowing. Cross sections were prepared from the lower and middle parts of the stems at each harvest and vessel volume fraction, vessel diameters, number of vessels and volume fraction of lignified cells were measured. The results showed that the effect of shade was significant on the anatomical variables. Generally, the values of the anatomical variables of the stem wood of the seedlings decreased with increased shade level. The findings indicate the importance of shade to M. oleifera seedling development and that it should be considered in nursery conditions
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