Pollen and Seed Morphology of Some Endemic Taxa in Saint Catherine, Sinai, Egypt

Abstract

Macro-and micro-morphological features of seeds and pollen grains of 12 endemic taxa belonging to seven families collected from Saint Catherine area, South Sinai, Egypt were examined by light microscope (LM) and scanning electron microscope (SEM). Macro-and micro-morphological characters, of seeds including shape, colour, size, brightness, seed surface, epidermal cell shape, anticlinal boundaries, and periclinal cell wall are presented. Pollen description includes shape, size, apertures and exine ornamentation. This study presents. Seeds of eight taxa and pollen of three taxa have been described for the first time in this study.

Authentication, Micromorphology and Ultrastructure of Pollen Grains and Seeds of Endemic Taxa in Saint Katherine Protectorate, South Sinai, Egypt

“…All pollen grains are isopolar, except Buffonia multiceps, S. leucophylla, S. oreosinaica, S. schimperiana (belonging to Caryophyllaceae) which are a polar. Such result is in accordance with Rabei et al (2016) and other previous studies on this family (Yildiz 2005), but disagrees with El-Ghamery et al (2018) since they reported that all endemic taxa in their study are isopolar. The shape class of the examined pollen grains is subprolate in S. oreosinaica and Origanum syriacum subsp.…”

“…Four taxa belonging to Caryophyllaceae are characterized by the presence of annulus which is absent in the rest of the studied taxa. These findings corroborate with Yildiz (2005); Krachai et al (2009); Pinar et al (2009); Osman (2012); Mostafavi and Mehregan (2014);El-Ghamery et al (2018) and Shiha (2020).…”

“…Pollen morphological characters in some members of endemic and near-endemic taxa in Sinai have been recorded by Shehata and Kamel (2007), Ibrahim (2015) and El-Ghamery et al (2018). From the foregoing data, the pollen morphological characters are considered diagnostic at the specific level among the studied taxa.…”

“…The research studies on the morphology of pollen grains and seeds of endemic taxa in Saint Katherine are few. There is no previous complete data available, despite that we can refer to some studies dealt with these taxa either in the context of the endemic flora of Egypt or as separate taxa within special groups (Shehata and Kamel 2007;Rabei et al 2016;El-Ghamery et al 2018;Shiha 2020).…”

Rapid characterization of hypanthium and seed in wild and cultivated rosehip: application of Raman microscopy combined with multivariate analysis

“…The pseudo-fruits (rosehip) of R. canina ( figure 1 ), often referred to as ‘fruits’ in literature sources, are aggregate fruits consisting of several achenes (the actual one seed-containing fruits of dog rose) enclosed by an enlarged fleshy floral cup (hypanthium) [ 28 ]. The rosehip has been analysed at macro- and micro-scale through achene morphology [ 29 , 30 ], morpho-anatomical characterization of achenes, mainly pericarp [ 31 , 32 , 33 ] and seed morphology [ 34 ]. In the upper part of the hypanthium, there is a small opening, filled with protruding styles ( figure 1 b ).…”