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Selected aspects of tiny vetch [Vicia hirsuta (L.) Gray S.F.] seed ecology: generative reproduction and effects of seed maturity and seed storage on seed germination

100%

Kucewicz M., Mackiewicz K., Zrobek-Sokolnik A.

Acta Agrobotanica

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2010

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tom 63

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nr 1

Vicia hirsuta (L.) Gray S.F. (tiny vetch) is a common and persistent segetal weed. Tiny vetch seeds and pods reach different stages of maturity during the crop harvest season. Some seeds that mature before cereal harvest are shed in the field and deposited in the soil seed bank, while others become incorporated into seed material. The objective of this study was to describe selected aspects of tiny vetch seed ecology: to determine the rate of individual reproduction of vetch plants growing in winter and spring grain crops and to evaluate the germination of seeds at different stages of maturity, subject to storage conditions. The seeds and pods of V. hirsuta were sorted according to their development stages at harvest and divided into two groups. The first group was stored under laboratory conditions for two months. In the autumn of the same year, the seeds were subjected to germination tests. The remaining seeds were stored in a storeroom, and were planted in soil in the spring. The germination rate was evaluated after 8 months of storage. Potential productivity (developed pods and flowers, fruit buds) was higher in plants fruiting in winter wheat than in spring barley. Vetch plants produced around 17-26% more pods (including cracked, mature, greenish-brown and green pods) and around 25% less buds in winter wheat than in spring barley. Immature seeds were characterized by the highest germination capacity. Following storage under laboratory conditions and stratification in soil, mature seeds germinated at a rate of several percent. After storage in a storeroom, seeds at all three development stages broke dormancy at a rate of 72- 75%. The high germination power of tiny vetch seeds stored in a storeroom indicates that this plant can be classified as an obligatory speirochoric weed species.

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The effect of pluvio-thermal conditions and changing day length on white mustard (Sinapis alba L.) development

84%

Harasimowicz-Hermann G., Wilczewski E., Kisielewska W.

Acta Scientiarum Polonorum. Agricultura

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2017

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tom 16

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nr 3

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Differences in accumulation of soluble alpha-galactosides during seed maturation of several Vicia species

84%

Lahuta L. B., Gorecki R. J., Gojlo E., Horbowicz M.

Acta Physiologiae Plantarum

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2005

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tom 27

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nr 2

Composition and levels of soluble α-galactosides: raffinose family oligosaccharides (RFOs) and galactosyl cyclitols (Gal-C) in developing seeds were measured by high resolution gas chromatography (HRGC) method. The studies were performed on maturing seeds of several wild and cultivated Vicia species: Viciaangustifolia L.(commonvetch), Vicia craccaL. (bird vetch), Vicia grandiflora Scop. (large yellow vetch), Vicia hirsuta (L.) S.F.Gray (tiny vetch), Vicia sativa L. (garden vetch, spring-growing cultivar Kwarta), and Vicia villosa Roth (winter vetch). In all Vicia species similar patterns in the accumulation of RF Os were observed. Galactinol - the donor of galactosyl moieties in α-galactosides biosynthesis was present in the middle stage of seed development, before appearing measurable levels of RFOs. Accumulation of RFOs started parallel with seed desiccation process. At first accumulation of the raffinose, then few days later stachyose and finally verbascose was noticed. In the final stage of seed maturation the verbascose was the main soluble α-galactoside (up to 3 % of dry weight, V. sativa). Besides the RFOs seeds of three Vicia species (V. cracca, V. hirsuta, and V. villosa) accumulated D-pinitol and its α-galactosides (Gal-C). Mono-galactosylpinitols (similar to raffinose) appeared in these species 2-4 days after galactinol, di-galactosyl pinitol A (common name: ciceritol) and di-galactosyl myo-inositol were present several days later than raffinose, and accumulation of tri-galactosyl pinitol A (TGPA) began after accumulation of stachyose. Matured seeds of V. hirsuta contained much more RFOs than Gal-C, opposite to seeds of V. villosa, and V. cracca where concentration of Gal-C was 4-8-fold higher than RFOs. In V. cracca seeds RFOs were almost replaced by Gal-C. In seeds of V. cracca and V. villosa the level of D-pinitol was significantly higher, than the level of myo-inositol. Contents of both cyclitols declined rapidly at the beginning of seed desiccation, when accumulation of RFOs and Gal-C quickly ini creased. We suggest that α-galactosides of D-pinitol can substitute raffinose family oligosaccharides and play similar role during seed maturation and storage.

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Changes in soluble sugars in relation to desiccation tolerance and effects of dehydration on freezing characteristics of Acer platanoides and Acer pseudoplatanus seeds

84%

Pukacka S., Pukacki P. M.

Acta Physiologiae Plantarum

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1997

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tom 19

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nr 2

The role of soluble sugars in desiccation tolerance was investigated in seeds of two species from the genus Acer: Norway maple (Acer platanoides L.) — tolerant and sycamore (Acer pseudoplatanus L.) — intolerant to dehydration. During two years of observations it was found that seeds of Norway maple acquire desiccation tolerance at the end of August i.e. about 125 days after flowering (DAF). During seed development, the transition from intolerant to tolerant state in Norway maple seeds was accompanied by the accumulation in seed tissues of raffinose, stachyose and sucrose. The sucrose/raffinose ratio in Norway maple seeds was lower than in sycamore. In mature Norway maple seeds sucrose and raffinose contents were higher than in sycamore. It was concluded, that soluble sugars such as sucrose, raffinose and stachyose may play an important role in desiccation tolerance and/or intolerance of Norway maple and sycamore seeds. Differential thermal analysis (DTA) was used to study the relationship between desiccation sensitivity and the state of water in seed tissues. The level of non-freezable water was the same in both analysed seed species, but the temperature of water crystallization during desiccation was lower in sycamore seeds.

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Chemical composition of broad bean seeds depending on the cultivar and degree of seed maturity

84%

Kmiecik W., Lisiewska Z.

Folia Horticulturae

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1994

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tom 06

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nr 1

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Molecular and applied aspects of the heat stress response and of common stress tolerance in plants

67%

Schoffl F., Prandl R., Hinderhofer K., Reindl A., Konzc C., Bako L.

Biological Bulletin of Poznań. Supplement

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1997

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tom 34

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AtGRP7 is involved in the regulation of abscisic acid and stress responses in Arabidopsis

67%

Cao S., Jiang L., Song S., Jing R., Xu G.

Cellular and Molecular Biology Letters

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2006

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tom 11

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nr 4

The Arabidopsis AtGRP7 gene, encoding a glycine-rich RNA-binding protein, has been shown to be involved in the regulation of a circadian-regulated negative feedback loop. However, little is known about the role of AtGRP7 in mediating abscisic acid (ABA) and stress responses. Here, we show that AtGRP7 plays a role in both. AtGRP7 was repressed by ABA, high salt and mannitol. Disruption of AtGRP7 by T-DNA insertion led to hypersensitive responses to ABA in both seed germination and root growth assays. The atgrp7-1 mutant was also hypersensitive to osmotic stress conditions, such as high salt and high concentrations of mannitol. In addition, the atgrp7-1 mutant plants accumulated significantly higher transcript levels of two ABA-and stress-inducible genes, RD29A and RAB18, compared with the wild-type plants. Taken together, these results suggest that AtGRP7 is involved in the regulation of ABA and stress responses.