The effect of temperature regulation on seed germination of the tropical tree Myrsine parvifolia A. DC near its southern limit

Ribeiro, José; Costa, César Serra Bonifácio

doi:10.1016/j.sajb.2015.02.012

Cited by 19 publications

(14 citation statements)

References 17 publications

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“…Synchrony of germination is one of the vigor parameters to quantify seed longevity [31], [32]. In our study, we found insignificant correlations between seed mass and synchrony of seed germination.…”

Section: Table 3 Coefficient Of Correlation Between Seed Mass and Secontrasting

confidence: 52%

The Relationship Between Seed Size and Seed Quality in UNPAD New Seed Collection of Sweet Corn Lines After Storage

Kadapi¹,

Nuraini²,

Wahyudin³

et al. 2018

Proceedings of the International Conference on Food, Agriculture and Natural Resources (FANRes 2018)

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Seed size before storage can affect the performance of the seed after storage. Seed size correlates to energy reserves, and therefore an evaluation of the relationship between seed size and seed quality is needed. This paper discusses variations in the seed sizes of sixteen UNPAD sweet corn lines to determine the relationship between seed size and seed quality. The sweet corn lines used in this study were classified into two groups by seed mass (weight). Seeds classified as small averaged between 8.0-10.6 g per 100 seeds in mass, and heavy seeds averaged between 11.5-13.7 g per 100 seeds. The results showed that seed moisture content and germination rate were significantly correlated to seed size, and there was a slight positive correlation between the seed germination rate and seed weight. We conclude that heavy seeds were of better quality than small seeds.

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Section: Table 3 Coefficient Of Correlation Between Seed Mass and Secontrasting

confidence: 52%

The Relationship Between Seed Size and Seed Quality in UNPAD New Seed Collection of Sweet Corn Lines After Storage

Kadapi¹,

Nuraini²,

Wahyudin³

et al. 2018

Proceedings of the International Conference on Food, Agriculture and Natural Resources (FANRes 2018)

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“…A similar performance of thermo-inhibition above 20 • C has been discovered in Myrsine parvifolia A. DC. as well [46]. Besides, thermo-inhibition phenomena have also been observed in two herbs, namely, Lactuca sativa Linn.…”

Section: The Reversibility Of Germination Inhibition From High Tempermentioning

confidence: 91%

Effect of Temperature, Light, and Storage Time on the Seed Germination of Pinus bungeana Zucc. ex Endl.: The Role of Seed-Covering Layers and Abscisic Acid Changes

Guo

Shen

Shi

2020

Forests

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Pinus bungeana Zucc. ex Endl. is an endemic conifer tree species in China with high ornamental value. In order to investigate favorable conditions for seed germination and explore the germination inhibition mechanism of this species at high temperatures, the effects of temperature, light, and storage on the mean germination time (MGT), speed of germination (SG), and total germination percentage (TGP) are evaluated here. Seeds that have either been kept still or entered into a state of dormancy at high temperature are assessed here by a recovery experiment. Furthermore, the contribution of covering layers on thermo-inhibition is analyzed here, including the way they work. This has been realized by the structural observation and via the determination of the abscisic acid (ABA) content. The results show that seeds germinate to a high percentage (approximately 90%) at temperatures of 15 or 20 • C, with or without light, whereas higher temperatures of 25 or 30 • C impeded radicle protrusion and resulted in the germination percentage decreasing sharply (within 5%). Inhibition at high temperatures was thoroughly reversed (bringing about approximately 80% germination) by placing the ungerminated seeds in favorable temperatures and incubating them for an additional 30 days. Dry cold storage did little to reduce the temperature request for germination. Embryo coverings, especially the nucellar membrane, and ABA levels both had a dominant role in seed germination regulation in response to temperature. Under favorable temperature conditions, the levels of ABA significantly decreased. Germination occurred when the levels dropped to a threshold of 15 ng/g (FW (Fresh Weight)). Incubation at a high temperature (25 • C) greatly increased ABA levels and caused the inhibition of radicle protrusion.Temperature is one of the primary factors affecting the percentage and speed of germination, which directly works via seed imbibition and the biochemical reactions that regulate the metabolism involved in the germination process [2]. Further, most species require an appropriate temperature range or alternate temperature mode to achieve maximum germination. In weeds, the germination behavior of seeds is also related to the time of seed produced and the moment elapsed from the seed settling. This behavior is owed to the environmental conditions undergone by the mother plant during seed maturation and those undergone by the seeds after settling [3]. The germination percentage usually increases linearly with temperature up to an optimal temperature, after which the germination percentage decreases sharply [4][5][6]. Increased temperatures not only affect seedling growth after seed germination, but also directly affect the germination process. To prevent seedlings from being damaged after germination, physiological reactions may occur in seeds to cope with the high-temperature environment in which they are placed. This ecological requirement can be considered as an adaptation strategy to guarantee favorable conditions for seedling development ...

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“…In this study, a protocol of synchronization of seed germination using a cold treatment is proposed, in which most of the seeds germinated within a few days after being transferred from cold conditions to optimal growing conditions. Although we observed that the seeds of J. maritima germinated at room temperature, the cold treatment seemed to synchronize seed germination by holding the development of the seedling until the temperature conditions are favourable (Garcia et al, 2006;Ribeiro and Costa, 2015). This enabled us to obtain a high number of seedlings in a similar developmental stage for induction of polyploidization.…”

Section: Discussionmentioning

confidence: 91%

Production of synthetic tetraploids as a tool for polyploid research

Castro

Loureiro

2018

Web Ecol.

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Abstract. Polyploidization has been traditionally considered a phenomenon that mediates ecological differentiation; however, the adaptive value of genome duplications has been seldom explored. Natural or synthetic polyploids offer unique opportunities to experimentally quantify the immediate consequences of genome duplications in plant traits that may be involved with ecological differentiation. Jasione maritima is a diploid-tetraploid complex with cytotypes distributed allopatrically in an environmental gradient ideal for exploring the role of genome duplications in the success of polyploid lineages. However, like in numerous other polyploid complexes, neotetraploids of J. maritima have not been found in nature. In this study we developed a methodology to obtain synthetic tetraploids from seeds collected in wild diploid plants of J. maritima. We tested the effect of different colchicine concentrations and seedling ages in survival and polyploidization success of J. maritima seedlings, using flow cytometry to assess ploidy level and considering the population of origin. A methodology to synchronize seed germination was also explored. Synchronization of seed germination was best achieved using a cold treatment of 2 weeks before the transference to a growth chamber. An overall survival rate of 11.5±0.7 % and further tetraploid conversion of 35.6±2.9 % was obtained using 3-day-old seedlings of J. maritima. Survival rates were variable depending on colchicine treatment (the highest the most lethal) and seedling origin (i.e. population), while conversion rate was similar across these factors and high rates of tetraploid conversion were obtained. Considering that the main constraint was survival to the colchicine treatment, we suggest the use of the lowest colchicine concentration tested, i.e. 0.1 % colchicine. The use of older seedlings increased survival rates but, in many cases, compromised a complete tetraploid conversion, generating many diploid-tetraploid mixoploid plants.

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The effect of temperature regulation on seed germination of the tropical tree Myrsine parvifolia A. DC near its southern limit

Cited by 19 publications

References 17 publications

The Relationship Between Seed Size and Seed Quality in UNPAD New Seed Collection of Sweet Corn Lines After Storage

The Relationship Between Seed Size and Seed Quality in UNPAD New Seed Collection of Sweet Corn Lines After Storage

Effect of Temperature, Light, and Storage Time on the Seed Germination of Pinus bungeana Zucc. ex Endl.: The Role of Seed-Covering Layers and Abscisic Acid Changes

Production of synthetic tetraploids as a tool for polyploid research

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