پديد آورندگان :
Uvalle Sauceda J.I نويسنده , Gonzalez Rodriguez H نويسنده , Ramirez Lozano R.G نويسنده , Cantu Silva I نويسنده , Gomez Meza M.V نويسنده
چكيده لاتين :
During two consecutive years, chlorophylls a and band carotenoids contents were determined, seasonally, in foliar tissue of native Trees (T) and Shrubs (S) from Northeastern Mexico such as Acacia rigidula (S), Bumelia celastrina (T), Castela texana (5), Celtis pal/ida (5), Croton cortesianus (5), Forestiera angustifolia (5), Karwinskia humboldtiana (5), Lantana macropoda (5), Leucophyl/um frutescens (5), Prosopis laevigata (T), Zanthoxylum fagara (T). Pigment determinations were carried out in a region of the State ofNuevo Leon, Mexico at three county (Los Ramones, China and Linares) sites, which are grouped under a similar climatic pattern. All pigments were significantly different between years, seasons and between plants within years and seasons, except yearxplant interaction for carotenoids at China site. All plants had marginal higher chlorophyll a content at Linares (0.79 mg g-l f.wt.) than China (0.71) or Los Ramones (0.66) site. Chlorophyll b content followed a similar trend as chlorophyll a (0.29, 0.25 and 0.23 mg g-l f.wt.,
respectively). Marginal differences in carotenoids content, in all plants, were found among sites being the 0.20 mg carotenoids g-l f.wt. Yearly and seasonal variations in plant pigments might have been related to
seasonal water deficits, excessive irradiance levels during summer and extreme low temperatures in winter that could have affected leaf development and senescence.
