Conservação de sementes de Magnolia ovata St. Hil

Pupim, Túlio Lourenço; Novembre, Ana Dionisia da Luz Coelho; Brancalion, Pedro Henrique Santin; Moraes, Maria Heloísa Duarte de; Mondo, Vitor Henrique Vaz; Labonia, Victor Domiciano de Silos

doi:10.1590/s0101-31222009000300011

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, there is an increase in seed vigor at the beginning of the reduction of moisture. Pupim et al (2009) andFaria et al (2004) also observed an increase in the physiologic potential of Magnolia ovata and Inga vera at the beginning of drying, and attributed this increase to the continued maturation during the drying period.…”

Section: Resultsmentioning

confidence: 95%

Physiological behaviour of Blepharocalyx salicifolius and Casearia decandra seeds on the tolerance to dehydration

et al. 2013

View full text Add to dashboard Cite

The present work aimed to develop studies on the tolerance to dehydration of Blepharocalyx salicifolius and Casearia decandra seeds. In order to verify the effect of drying on the seeds, they were placed in desiccators containing a saline solution saturated with potassium acetate (23.5% RH) at temperature of 15 °C. After obtaining the desired moisture contents, the seeds were submitted to the germination, vigor, tetrazolium and electrical conductivity tests. It can be concluded that under slow drying conditions, the seeds of B. salicifolius and C. decandra were sensitive to moisture reduction of 29% to 25%, and lost viability at around 14% and 8% of moisture content, respectively. The physiological changes occurring during seed drying showed there was a decrease in viability and vigor and an increase in electrical conductivity values starting at 25% seed moisture content.

show abstract

Section: Resultsmentioning

confidence: 95%

Physiological behaviour of Blepharocalyx salicifolius and Casearia decandra seeds on the tolerance to dehydration

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Magnolia ovata (Magnoliaceae) is a native forest tree used for recuperation of areas near rivers; it produces recalcitrant seeds (23.5% water content) that lose viability after 30 d storage. In contrast, viability was maintained for 60 d (starting at 30%, decreasing to 23%, compared to initial germination rate) in seeds dehydrated to 10.9% water content and stored at 15°C or 20°C (Pupim et al 2009). Another Magnoliaceae, Talauma ovata, was also classified as recalcitrant by Carvalho et al (2006).…”

Section: Progress and Incentives For Recalcitrant Seed Conservation Imentioning

confidence: 98%

In vitro and cryogenic preservation of plant biodiversity in Brazil

Pilatti

Aguiar

Simões

et al. 2010

In Vitro Cell.Dev.Biol.-Plant

View full text Add to dashboard Cite

The Brazilian biomes (Amazon, Atlantic Forest, Cerrado, Caatinga, Pantanal, and Pampa) comprise one of the highest levels of plant diversity in the world; however, non-sustainable practices, deforestation, and land use have resulted in significant losses and fragmentation of the native forests. These ecosystems are now threatened and protection of their native plants through ex situ conservation is an urgent necessity. Cryopreservation and in vitro conservation are complementary options for securing and protecting Brazil's native plant species because their potential economic value is critically important to develop strategies that will (1) support their sustainable utilization, (2) protect against the over-exploitation of species growing in natural habitats, and (3) conserve the genetic diversity of germplasm from species of different provenances. Biotechnological approaches will help to address future economic and environmental demands placed upon already at-risk species. Conserving seed germplasm ex situ provides an additional safeguard against the risks (e.g., loss due to disease, climate change) of field conservation. Moreover, seed banks and cryobanks permit the long-term conservation of a wider genetic base; this offsets the labor and space intensive costs of conserving in the active growing state. This paper is a compilation of the current status of strategies applied for conserving Brazilian native plant species.

show abstract

Seed Longevity of Five Tropical Species From South-Eastern Mexico: Changes in Seed Germination During Storage

Becerra-Vázquez

Sánchez‐Nieto

Flores-Ortíz

et al. 2018

Tropical Conservation Science

View full text Add to dashboard Cite

To design conservation strategies, the extent of plant richness of tropical forests needs to be characterized in terms of their seed longevity. In this study, we examined the potential seed longevity, that is, storage ex situ, of species from southeastern Mexico: Chamaedorea glaucifolia, Cymbopetalum baillonii, Magnolia mexicana, Nectandra coriacea, and Ternstroemia tepezapote. Immediately after collection, seeds were stored at different temperatures (23 C). We evaluated seed germination after different storage durations. Seed water content (WC) was determined for each period. Seed desiccation sensitivity was determined as WC 50 , which is the WC at which the initial seed viability decreases to 50%; further, the time required to reach WC 50 was also determined. Subsequently, we analyzed the relations between seed functional traits with other morphological and functional traits, along with the weather characteristics of their respective habitat. All of the studied species had shortlived seeds; they exhibited desiccation sensitivity after storage with differences across the species. Additionally, C. baillonii exhibited differences in seed desiccation sensitivity across 2 years of seed collection. Interaction was observed between storage time and storage temperature: Seeds exhibited less deterioration at 15 C in C. glaucifolia and C. baillonii and at 5 C in M. mexicana and N. coriacea. Seed storage behavior is discussed in this article. Finally, a relationship determined between germination traits, and seed WC, embryo size, endosperm amount, and rain and temperature patterns in the month of seed dispersal explained the limited longevity of the studied species.

show abstract

Conservação de sementes de Magnolia ovata St. Hil

Cited by 3 publications

References 5 publications

Physiological behaviour of Blepharocalyx salicifolius and Casearia decandra seeds on the tolerance to dehydration

Physiological behaviour of Blepharocalyx salicifolius and Casearia decandra seeds on the tolerance to dehydration

In vitro and cryogenic preservation of plant biodiversity in Brazil

Seed Longevity of Five Tropical Species From South-Eastern Mexico: Changes in Seed Germination During Storage

Contact Info

Product

Resources

About