Tipificação polínica em Leguminosae de uma área prioritária para conservação da Caatinga: Caesalpinioideae e Papilionoideae

Abstract

Tipifi cação polínica em Leguminosae de uma área prioritária para conservação da Caatinga: Caesalpinioideae e Papilionoideae ABSTRACT(Pollen typifi cation of Leguminosae from a priority area for conservation of Caatinga: Caesalpinioideae and Papilionoideae). Th e municipality of Mirandiba, in Pernambuco, is considered a priority area for conservation of Caatinga and has a diverse fl ora. In this region, the family with the greatest number of species is the Leguminosae, which is represented by about 25% of the species known from the Caatinga. In this study we characterized the pollen grains of the subfamilies Caesalpinioideae and Papilionoideae, and established groups based on pollen morphology. Diff erences found within the Caesalpinioideae are discussed, especially exine ornamentation, which is striking between the different genera. In Papilionoideae, the most conspicuous diff erence was the type of aperture, where pores, colpores, and colpi were observed. In the two subfamilies, most genera are considered stenopalynous, making it diffi cult recognize species by only morphometric characters.

Pollen of <i>Bauhinia</i> L. and <i>Phanera</i> Lour. (Leguminosae-Caesalpinioideae) from the Brazilian Caatinga

“…pollen grains [19][20][21][22][23]. Size differences among pollen grains are common within individuals of the same species (see Table 2).…”

“…Such pollen morphology is consistent with that observed here for species in the corresponding section (B. catingae, B. forficata, and B. pentandra). In Bauhinia cheilantha and B. subclavata, however, the pollen grains present porate apertures with a length/breadth ratio less than two [17,23]. Therefore, Melhem and Salgado-Labouriau [19], when describing the pollen grains of B. bongardii Steud., preferred to use the term "apertural area" instead of using the concepts of colpus or porus.…”

“…Therefore, Melhem and Salgado-Labouriau [19], when describing the pollen grains of B. bongardii Steud., preferred to use the term "apertural area" instead of using the concepts of colpus or porus. Buril et al [23] also described pollen grains of B. acuruana and B. cheilantha as colpate and porate, respectively.…”

“…Reticulation of the exine supporting gemmiform or claviform processes has been recorded by authors who have studied the pollen grains of Bauhinia s.l. species [12,19,20,22,23]. However, these pollen features are not exclusive to Bauhinia.…”

Palynological characterization of five species of Senna Mill (Fabaceae) in the Valleys Calchaquíes, Province of Salta, Argentina

“…Fuera de Argentina se mencionan otras contribuciones, para México, Palacios-Chávez et al (1996) y Sánchez-Dzib et al (2009); para Pakistán, Perveen & Qaiser (1998); para Lima (Perú), Ventura & Huamán (2008) y finalmente para la caatinga de Brasil, Buril et al (2011).…”