Water uptake by Annona diversifolia Saff. and A. purpurea Moc. & sessé ex dunal seeds (Annonaceae)

Abstract

-Annonaceae seeds are known by presenting dormancy mechanisms, whose reports ranging from coating impermeable to the physiological dormancy. By this way, the present study aimed to evaluate water uptake in Annona diversifolia Saff and Annona purpurea Moc & Sessé ex Dunal seeds. For this study, seeds were placed under immersion in distilled water, and used four replicates of 25 seeds of each species, which were weighed during the 480 hours that were immersed. To determine the place of purchase of water, Annona diversifolia seeds were sealed with paraffin at different locations. Based on the results, seeds from both species reached the phases I and II of water uptake, which indicates they are not hard; however, germination (Phase III) was not reached. Annona diversifolia seeds completed Phase I with, 50h and Annona purpurea with 70h from imbibitions begin, which shows that even slowly, water is acquire. Index terms: Annonaceae, propagation, seed dormancy, imbibition. AQUISIÇÃO DE ÁGUA EM SEMENTES DE

Oxidative metabolism altered by plant growth regulators in atemoia seeds (Annona x atemoya Mabb.) ‘Thompson’

“…Results regarding the water acquisition curve found in this experiment (Figures 1, 2 and 3) were similar to those reported by Ferreira et al (2006) for the transition of phases I, II and III in atemoia cv 'Gefner' seeds from a plant population located in the municipality of Assai (PR). The fact that seeds have reached stage I (imbibition), characterized by increase in the amount of water, confirms the absence of physical dormancy (characterized by seed coat impermeability) in atemoya seeds, which was also observed in seeds of other species of the genus Annona, such as Annona diversifolia and A. purpurea (FERREIRA et al, 2014).…”

Propagation of Annonaceous plants

“…purpurea and A. emarginata (reviewed in FERREIRA et al, 2014). This period not only helps detecting the integument impermeability but has been used to determine seed treatments in immersion with plant regulators, or for osmotic conditioning, since it is the period of greatest water acquisition by seeds FERREIRA et al, 2014).…”

Morphometry of chincuya seeds (Annona purpurea Moc. &Sessé ex Dunal) and embryonic growth under dry warm storage

“…The seed coat has a similar thickness in the middle and basal part (Table 1) however, in the upper part, it is almost 4 times thicker than the base. The seed coat, although rigid, lignified and thick, it does not interfere with imbibition because it is permeable (VIDAL-LEZAMA et al, (2008);FERREIRA et al, (2014FERREIRA et al, ( , 2016, also in other species of the genus Annona, the non-existence of Ferreira et al (2019).…”