Histochemical and ultrastructural study of Caesalpinia peltophoroides Benth. (Leguminosae-Caesalpinoideae) seeds

Abstract

-The objective of this work was to correlate data on light microscopy observations through histochemical analysis and polarized light techniques and investigations in transmission electron microscopy (TEM) to characterize the reserve materials in C. peltophoroides Benth. (Leguminosae-Caesalpinoideae) cotyledons, popularly known as "sibipiruna", a tropical tree species with wide distribution in Brazil. The cotyledon mesophyll, especially in the abaxial face, is rich in unsaturated neutral lipids contained in numerous lipid bodies dispersed in the cytoplasm. Proteins, more concentrated in the adaxial face of the cotyledons, occur in all the mesophyll and are stored in protein bodies containing globoids, with variable number and size, responsible for accumulation of mineral reserves. Calcium oxalate druses have distribution restricted to the cotyledons adaxial face and are associated with protein bodies. Starch, also distributed all over the cotyledon mesophyll, occurs in small amounts in plastids with developed lamellar system. Secretory cavities rich in phenolic compounds occur among procambial strands. Keywords

New Information of the Anatomy and Phytochemical Screening of Pentaclethra macroloba (Willd.) Kuntze (Caesalpinioideae-Leguminosae) Seeds

“…Starch is distributed throughout all regions of the P. macroloba seed, similarly to what has been observed for other species of Leguminosae [88,89]. The starch stored in the seeds is an insoluble polysaccharide consisting of amylose and amylopectin [90].…”

“…The starch stored in the seeds is an insoluble polysaccharide consisting of amylose and amylopectin [90]. In the P. macroloba seeds, a large accumulation of lipids was observed; however, for some Leguminosae seeds, the accumulation of lipid compounds is inversely proportional to the starch [89]. Therefore, reserve carbohydrates stored in some legume seeds can be applied as taxonomic characteristics, since they do not occur regularly between subfamilies [88,91].…”

Localisation of Storage Reserves in Developing Seeds of Pongamia pinnata (L.) Pierre, a Potential Agroforestry Tree

“…These secretory cells might synthesise karanjin and other flavonoids in pongamia and provide a defense against fungal and bacterial decay. A similar kind of secretory cell secreting secondary metabolites has been reported in Azadirachta indica [25] and Caesalpinia peltophoroides [26]. In legume seeds, the developing pod walls and seed coat are transient reserves of assimilates and other nutrients for transportation into the developing cotyledons [27,28].…”

“…The globoids are electron-dense inclusions that mainly constitute mineral reserves such as iron, manganese, magnesium, potassium and calcium [43]. The average diameter of PSV of the developed pongamia seed is similar to the PSV of mature seed of Caesalpinia peltophoroides [26].…”

Estudio de la actividad antioxidante de diversas plantas aromáticas y/o comestibles

“…Caesalpinia is a pantropical genus that presents around 140 species [359]. The genus is anatomically characterized by the presence of different types of secretory structures throughout the plant [360]. Such structures, in combination with other anatomical characters, have been used for taxa delimitation within Caesalpinia [359,361].…”