Metabolic and structural changes during early maturation of Inga vera seeds are consistent with the lack of a desiccation phase

Caccere, Rodrigo; Teixeira, Simone de Pádua; Centeno, Danilo da Cruz; Figueiredo-Ribeiro, Rita de Cássia L.; Braga, Márcia R.

doi:10.1016/j.jplph.2013.01.002

Cited by 40 publications

(39 citation statements)

References 34 publications

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“…Similar results were also observed by Pavithra et al () and Sangwan et al () in P. pinnata seeds. Caccere et al () also detected the same in I. vera seeds, as evidenced by the observed increase in size and number of starch grains in the embryonic axis and cotyledons, similarly to what we observed in our study.…”

Section: Discussionsupporting

confidence: 92%

“…Possibly, changes in the contents of RS, TSS and Suc, as well as in the pattern of cell division, which is resumed at late seed development, occur with the purpose of ensuring fast germination after dispersal. Similar results in regard to the concentrations of these sugars have been reported to seeds of H. brasiliensis (Bonome et al 2011), Inga vera (Caccere et al 2013), and Pongamia pinnata (Pavithra et al 2014), all of which are recalcitrant species.…”

Section: Discussionsupporting

confidence: 82%

“…Such modifications are associated with seed maturation and are closely related to orthodox seeds (Bryant et al , Barbedo et al ). On the other hand, a lower proportion of polysaccharides and an increased number and size of vacuoles are observed in recalcitrant seeds like those of Inga vera , which indicates the occurrence of high metabolic activity in the embryo (Caccere et al ).…”

Section: Introductionmentioning

confidence: 99%

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Sugar metabolism and developmental stages of rubber tree (Hevea brasiliensis L.) seeds

Souza

Dias

Pimenta

et al. 2017

Physiologia Plantarum

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Changes in the concentration of sugars and sucrose metabolism enzymes can characterize the developmental stages of a seed. In recalcitrant species such as Hevea brasiliensis L., little is known about these changes. We aimed to evaluate the three main stages of development of rubber tree seeds - histodifferentiation, cell elongation and accumulation of reserves. The activities of acid and neutral invertases (E.C. 3.2.1.26) and sucrose synthase (EC 2.4.1.13), and the concentrations of reducing sugars (RS), total soluble sugars (TSS) and sucrose (Suc) were determined concomitantly with the histochemical and anatomical evaluation of seed structure. Histodifferentiation in rubber tree seeds occurs up to 75 days after anthesis (DAA). The concentration of RS is high and of Suc is low during seed histodifferentiation, which occurs along with a visible increase in the number of cell divisions. After that period, there is an increase in the concentration of Suc (mg g ) and in the number and size of starch granules, and a decrease in the concentration of RS (mg g ). At that point, cell elongation occurs. At 135 DAA, there is an inversion in the concentration of these two sugars and an increase in reserve accumulation. Thus, in seeds of the evaluated clone, the period up to 75 DAA is characterized as the histodifferentiation stage, while from that time up to 120 DAA the cell elongation stage takes place. The final stage of seed maturation and reserve accumulation begins at 135 DAA, and the seed, including the embryo, is completely formed at 175 DAA.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Sugar metabolism and developmental stages of rubber tree (Hevea brasiliensis L.) seeds

Souza

Dias

Pimenta

et al. 2017

Physiologia Plantarum

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“…Because of their high water content, typical of recalcitrant seeds, inga embryos exhibit very high metabolic activity even after shedding (Barbedo and Marcos Filho 1998;Caccere et al 2013), from which derives their short longevity, as corroborated by the results found on the germination test of the present study. The dehydration of embryos collected in 2010 probably led them to an uncontrolled metabolism (Berjak and Pammenter 2013), accelerating the deterioration and the development of latent fungi.…”

Section: Discussionsupporting

confidence: 89%

Fungicide and drying effects on the viability of recalcitrant seeds of Inga vera subsp. affinis

Parisi

Biagi

Medina

et al. 2016

Trop. plant pathol.

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Studies on the health and quality of seeds from native tree species are scarce in the tropics, which is the case of Inga vera, a recalcitrant-seeded Brazilian species used in reforestation. In this study a series of experiments were conducted to analyze the effects of fungicides and hydration levels on the suppression of seed borne fungi and seed physiology. Firstly, three commercially available fungicide formulations (thiram, carbendazim + thiram and carboxin + thiram) for seed treatment were evaluated. Secondly, embryos were subjected to a combination of four drying levels (62, 52, 44 e 34 % water content) with or without fungicide (carbendazim + thiram). All three preliminary screened fungicide formulations were not phytotoxic, with carbendazim + thiram performing best. Seed deterioration was associated with a high incidence of fungi at any level of drying. Fungicide treatment reduced the incidence of the most common fungi (Acremonium curvulum and Phomopsis diachenii) and extended the lifespan of non-dried embryos from 90 to 120 days.

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“…Studies on the metabolism of recalcitrant seeds have been performed by several authors (Barbedo & Bilia 1998;Song et al 2003;Berjak & Pammenter 2008;Caccere et al 2013;Pammenter & Berjak 2014;Walters 2015), including studies on ex situ conservation by storage (Pammenter et al 1994;Drew et al 2000;Li & Pritchard 2009;Pasquini et al 2012;Charloq et al 2013;Walters et al 2013;Bonjovani & Barbedo 2014;Liu et al 2014). Storage of recalcitrant seeds under desiccating conditions resulted in the initiation of subcellular damage, which may be repaired when seeds are set-out to germinate (Farrant et al 1989;Tarquis & Bradford 1992).…”

Section: Introductionmentioning

confidence: 99%

Establishment of post-harvest early-developmental categories for viability maintenance of Araucaria angustifolia seeds

Araldi

Coelho

2015

Acta Bot. Bras.

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Araucaria angustifolia seeds are recalcitrant, and their metabolism remains high during storage. This research aimed to describe the initiation of germination in A. angustifolia seeds during storage in order to standardize the assessment of physiological quality and to promote seed conservation. Seeds were collected from two populations and stored for 270 days in the natural laboratory environment and cold chamber. Seeds were classified according to four early developmental stages: I -mature seeds; II -seeds with elongation along the embryonic axis; III -beginning of root protrusion; IV -advanced germination stage, with seedling shoots. After categorization, physical and physiological quality was assessed. In freshly collected seeds, only category I was observed. At 270 days, approximately 40% of seeds were in category III in laboratory conditions, while the maintenance in a cold chamber delayed germinative metabolism. Viability tests showed that seeds in categories III and IV were more susceptible to damage caused by storage.In conclusion, the percentage of viable A. angustifolia seeds depends on the development stage after collection. Seeds that have reached early developmental category III should be prioritized for propagation, while those remaining in categories I and II should be longer stored with periodic assessment for reduction in physiological quality.

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Metabolic and structural changes during early maturation of Inga vera seeds are consistent with the lack of a desiccation phase

Cited by 40 publications

References 34 publications

Sugar metabolism and developmental stages of rubber tree (Hevea brasiliensis L.) seeds

Sugar metabolism and developmental stages of rubber tree (Hevea brasiliensis L.) seeds

Fungicide and drying effects on the viability of recalcitrant seeds of Inga vera subsp. affinis

Establishment of post-harvest early-developmental categories for viability maintenance of Araucaria angustifolia seeds

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