The pollen morphology of lbur species from the genus Trigonella L. （Fabaceae） distributed in Tunisia （T. foenum-graecum, T. maritima, T. stellata and T. monspeliaca） was studied with light and scanning electron ...The pollen morphology of lbur species from the genus Trigonella L. （Fabaceae） distributed in Tunisia （T. foenum-graecum, T. maritima, T. stellata and T. monspeliaca） was studied with light and scanning electron microscope （SEM）. Results showed that the pollen morphology of these four species was not homogenous in relation to shape, dimensions and ornamentation. The pollen grains were 3-zonocolporate, radially symmetrical, isopolar, prolate to perprolate type （P/E = 1.45-2.09）. Medium in size, elliptical or rectangular-obtuse-convex in equatorial view and circular in polar view. Ectoapertures-colpi： long, medium width, with acute ends, endoapertures-pork large, circular to lolongate, protruding in mesocolpium. The rectum was reticulate to perforate reticulate with ± irregular pattern of muri, except for T. monspeliaca which ornamentation was relatively homogeneous with a loose network and psilate area. Ornamentation with lumina different in size was most clearly expressed in mesocolpium while the apocolpium and the area just along the apertures was psilate or with small scattered puncta. The exine thickness was 1.10-2.42 μtm.展开更多
文摘The pollen morphology of lbur species from the genus Trigonella L. （Fabaceae） distributed in Tunisia （T. foenum-graecum, T. maritima, T. stellata and T. monspeliaca） was studied with light and scanning electron microscope （SEM）. Results showed that the pollen morphology of these four species was not homogenous in relation to shape, dimensions and ornamentation. The pollen grains were 3-zonocolporate, radially symmetrical, isopolar, prolate to perprolate type （P/E = 1.45-2.09）. Medium in size, elliptical or rectangular-obtuse-convex in equatorial view and circular in polar view. Ectoapertures-colpi： long, medium width, with acute ends, endoapertures-pork large, circular to lolongate, protruding in mesocolpium. The rectum was reticulate to perforate reticulate with ± irregular pattern of muri, except for T. monspeliaca which ornamentation was relatively homogeneous with a loose network and psilate area. Ornamentation with lumina different in size was most clearly expressed in mesocolpium while the apocolpium and the area just along the apertures was psilate or with small scattered puncta. The exine thickness was 1.10-2.42 μtm.
