Anatomical Description of Stomata and Trichomes in leaves of Tidestromia lanuginosa (Nutt) Standl (Amaranthaceae), from the municipios of Saltillo, Coah. and Lampazos de Naranjo, N.L., Mexico.
DOI:
https://doi.org/10.59741/agraria.v14i3.550Keywords:
Tidestromia lanuginosa, stomata, trichomesAbstract
The anatomy of stomata and trichomes in leaves of Tidestroma lanuginosa(Nutt) Standl (espantavaqueros), is described and compared in two localties of Northeastern Mèxico. Samples were collected in the Municipios of Saltillo, Coah. and Lampazos de Naranjo , N.L. taken to the laboratory to be processed by an epidermal detachment technique, and the slides observed under a light microscope; while another group of samples were prepared for electronical scanning microscopy. Observations in epidermal detachment slides reveal tha stomata are located in the abaxial surface of the leave (hipostomatal), with no accessory cells surrounding the guard cells (anomocitic type ); the electron micrographies show stomatal cells in a higher position than the other epidermal cells in the Lampazos samples, while at the same level in the Saltillo leaves. Trichomes are candelabrifom, star- shaped, with 8 to 10 branches each. Highly significant differences (p < 0.01) were founded in stomatal index, being higher in Lampazos (27.12 %) than in Saltillo (24.7 %); a stomatal density higher in Saltillo (214.44 / mm2)) than in Lampazos (134.44/mm2 ), and a stomatal area higher in Lampazos (359.50 mm2) than Saltillo (227.83 mm2 ). Such differences might be due to local environmental influence, and a possible difference in chromosome number (ploidy), as well. Trichome density, however, showed no statistical difference in both localties, indicating stability in this character.
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