Pollen production in halophytic species of the Chenopodiaceae in a Mediterranean marsh

Fernández-Illescas, Francisca; Nieva, F. Javier J.; Márquez-García, Belén; Muñoz‐Rodríguez, Adolfo F.

doi:10.1080/00173134.2010.522728

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…The palynological investigation on Cressa cretica is very few and this is may be due to the low pollen production of halophytes as mentioned by [32]. In this concern [33] found that the pollen production of the same species was few in the saline habitats than that in non-saline ones.…”

Section: Pollen Morphologymentioning

confidence: 91%

Systematic study in Cressa cretica L. (Convolvulaceae) species from Lake Qarun, El-Fayoum province, Egypt

Wafaa Kamal Taia,

Amany Mohamed Abd El-Maged

2023

Int. J. Life Sci. Res. Arch.

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Cressa cretica L. is a monotypic species belongs to the plant family Convolvulaceae, tribe Cresseae. It is an erect, small, dwarf shrub, commonly grown in coastal areas and considered as an important medicinal plant with many therapeutic effects. Individuals of this species became restricted in specific areas in Egypt in became under threat of extinction. This study dealt with careful examination of the external and leaf internal structure beside pollen grain morphology. The study aims to understand the species morphological characteristics and protect it from localization and destruction processes. The results showed that the leaf macro- and micro-morphological characters are of the halophytic ones, with long unicellular hairs as well as T-shaped hairs and sunken stomata. The leaf internal structure has mesophyll differentiated into one layer palisade and spongy layers full of ca-oxalate crystals and salt glands distributed in the mesophyll. Pollen grains productivity was few and they are small, spheroidal to subprolate with tricolporate aperture and tectate perforate with supra-tectum granules. The results obtained show that Cressa cretica has external and internal halophytic structure in addition to few small pollen grains. Germination experiments needed to test the pollen productivity of this plant under non-saline habitats for its conservation.

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Section: Pollen Morphologymentioning

confidence: 91%

Systematic study in Cressa cretica L. (Convolvulaceae) species from Lake Qarun, El-Fayoum province, Egypt

Wafaa Kamal Taia,

Amany Mohamed Abd El-Maged

2023

Int. J. Life Sci. Res. Arch.

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“…It is generally believed that stamen reduction is paralleled with a decrease in pollen grain number. In fact, pollen production among closely related species is often associated with stamen number per flower and anther size (Bhowmik & Datta, 2013; Fernández‐Illescas et al, 2010). The impact of stamen loss on total pollen production might be compensated by an increase in pollen production per stamen.…”

Section: Introductionmentioning

confidence: 99%

Pollination efficiency and pollen limitation in bistaminate vs tetrastaminate Lamiaceae

Naghiloo

Nikzat-Siahkolaee

Esmaillou

et al. 2021

Plant Species Biology

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The evolution of bilabiate flowers in Lamiaceae has several times led to a reduction in stamen number. It is generally assumed that stamen reduction goes along with decreasing pollen production. One should, therefore, expect that bistaminate flowers have either a more efficient pollen transfer mechanism or a higher selfíng rate than tetrastaminate species to adapt to the stamen reduction. We tested this hypothesis in a community of Lamiaceae including three bistaminate and three tetrastaminate species. The results of selfing experiments, extra-pollination, counting pollen number, and stigmatic pollen load analysis were used to calculate the autonomous selfing index, the pollen limitation index, and the pollination efficiency index. The results indicate a significantly lower pollen number in bistaminate flowers than in tetrastaminate flowers of similar anther size. Bistaminate species shared a higher selfing rate which was related to their structural adaptation to delayed selfing. In Ziziphora clinopodioides, the delayed selfing was accompanied by low pollination efficiency, and plants suffered from pollen limitation at the location studied. However, in Salvia sclarea and Salvia hypoleuca, which benefited from a relatively high pollination efficiency, no pollen limitation was observed. Our results reveal a close association between adaptive mechanisms such as increasing precision of pollen transfer and evolution of delayed selfing with stamen reduction in bistaminate Lamiaceae.

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Dichogamy in Salicornieae species: establishment of floral sex phases and evaluation of their frequency and efficacy in four species

et al. 2011

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Pollen production in halophytic species of the Chenopodiaceae in a Mediterranean marsh

Cited by 7 publications

References 28 publications

Systematic study in Cressa cretica L. (Convolvulaceae) species from Lake Qarun, El-Fayoum province, Egypt

Systematic study in Cressa cretica L. (Convolvulaceae) species from Lake Qarun, El-Fayoum province, Egypt

Pollination efficiency and pollen limitation in bistaminate vs tetrastaminate Lamiaceae

Dichogamy in Salicornieae species: establishment of floral sex phases and evaluation of their frequency and efficacy in four species

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