Okra varieties showed significant variations in hair density on leaf
midrib, fruit, leaf lamina and leaf veins as shown in Table II.
The genotypes that showed better results for the
midrib region were U.
The adjusted linear regressions between the
midrib of the 3rd leaf of the banana tree in function of the application of P doses in the soil were significant at 10; 5 and 5% probability in the first, second and third cycle, respectively (Figure 1).
In addition to cuticle thickness, the parameter that significantly differed between the populations was SI of both the leaf sides; the height of the
midrib, which was positively correlated with the thickness of the outer periclinal external walls of the adaxial surface of the leaf (r = 0.8357, p = 0.38); the number of ducts in the ground parenchyma of the
midrib, which was positively correlated with the
midrib width (r = 0.6482, p = 0.164) and the leaf area (r = 0.5573, p = 0.251); and the thickness of the mesophyll.
The size of the
midrib in relation to the mesophyll representing by a voluminous
midrib is a possible synapomorphy for the Lychnophorinae subtribe (Fig.
Those blades often have
midrib. Spearheads of the second group have blades and sockets with an approximately equal length and the cross-section of a blade is rhombic and flat, sometimes they have a shallow
midrib.
With this kind of problem from our coconut farmers, the researcher decided to produce and evaluate a charcoal made from the neglected coconut leaf
midrib. The discarded plant material is naturally rich in carbon, which, like wood chunks can be used in making a homemade charcoal.
3.5 mm diam.; petiole 7-23 mm long, smaller than the rachis; 1 extrafloral nectary, green-vinaceous, sessile, pyramidal, 1-3 mm long, located on the rachis, between the proximal pair of leaflets; rachis 13-15 mm long; leaflets discolorous, 2 pairs, semisucculent, adaxial surface pilose, abaxial surface tomentose, obovate to elliptic, 21-88 X 9-41 mm, apex rounded, base assimetric, venation penninervous,
midrib excentric.
The presence of the tightly packed stellate trichomes, the stomata type, density, distribution, and length, the lenticels on the
midrib, and the different textural cuticle found on the epidermis could be useful in providing taxonomic information and could also serve as a database for future references of the species.
Plant growth was evaluated after 60 and 75 DAE (stages F3 and C1 according to the scale of Marur & Ruano (2001)) to obtain plant height, number of leaves and
midrib length of all leaves in 10 plants previously selected.
Midrib to
midrib distance in cm###100###2.98 0.26###2.40###3.5###2.79 3.3f