Leaf area morphology

The wild diploid and tetraploid species of wheat possess much higher rates of flag leaf photosynthesis than the cultivated hexaploids (1) The high rates of photosynthesis per unit leaf area have been correlated with several morphological and anatomical traits (2>3). Attempts have also been made to correlate the in vitro electron-transport rates with leaf photosynthesis. Zelenskii et al (4) found that the chloroplasts of wild diploid species had 42 per cent higher rates of uncoupled Hill reaction as compared with cultivated hexaploid. This was later confirmed by Miginiac-Maslow et al (5). However,... 

Morphological modifications were coincident in water stressed plants in which respects to leaf number and leaf area reduction. However the extend of this modifications clearly contrasted between the two cvars. Clare didn t reduce leaf number, but it showed 40% lower leaf area under water stress. Seaton Park leaf number under drought was to about half of under irrigation. Plant production under water stress was only little lower in Clare but it was 46% lower in Seaton Park (in respect to irrigated plants) (table 1). 

In the area of the leaf surface in contact with the . graminis film, the cuticle loses its original integrity as evidenced by the apparent dissolution of surface wax crystals. Within 60 min the film disappears and the surface of the conidium again assumes the morphology of the unstimulated state. 

Preliminary results of the forthcoming revision of Calyptrochaeta species reported from Malesia and adjacent areas by the first author reveal that seven species can be recognized. Members of the genus, at least the Malesian ones, demonstrate several morphological features remarkable for mosses, e.g., two-celled teeth at leaf margins that are composed of the proximal and the distal part... 

Fig. 2.5 Morphological effects of the recrystallization of isotactic polypropylene at 145 °C (a) radial growth enclosing a leaf-shaped area of cross-hatched material, (b) a similar area after partial melting (From figure 4 in. Weng J, Olley RH, Bassett DC and Jaaskelainen P, Changes in the Melting Behavior with the Radial Distance in Isotactic Polypropylene Spherulites. J. Polym. Sd. Polym. Phys. 41 2342-2354. Copyright 2003 by John Wiley Sons, hic. Reprinted by permissirai of John Wiley Sons, Inc.)...

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