Seed Potassium Concentration Decline During Maturation Is Inversely Related to Subsequent Germination of Primrose

Zerche, S.; Ewald, A.

doi:10.1081/pln-200052631

Cited by 12 publications

(12 citation statements)

References 76 publications

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“…Accumulation of mineral nutrients into the developing seeds is thought to be a prerequisite for efficient germination and seedling establishment. It has been shown that the germination capacity can depend on the control of seed K + content (Zerche and Ewald, 2005). It is likely that VvK1.1 is involved in this control by contributing to the K + uptake of the developing pips.…”

Section: Discussionmentioning

confidence: 99%

A grapevine Shaker inward K⁺channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

Cuéllar¹,

Pascaud²,

Verdeil³

et al. 2010

The Plant Journal

125

101

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Summary Grapevine (Vitis vinifera), the genome sequence of which has recently been reported, is considered as a model species to study fleshy fruit development and acid fruit physiology. Grape berry acidity is quantitatively and qualitatively affected upon increased K+ accumulation, resulting in deleterious effects on fruit (and wine) quality. Aiming at identifying molecular determinants of K+ transport in grapevine, we have identified a K+ channel, named VvK1.1, from the Shaker family. In silico analyses indicated that VvK1.1 is the grapevine counterpart of the Arabidopsis AKT1 channel, known to dominate the plasma membrane inward conductance to K+ in root periphery cells, and to play a major role in K+ uptake from the soil solution. VvK1.1 shares common functional properties with AKT1, such as inward rectification (resulting from voltage sensitivity) or regulation by calcineurin B‐like (CBL)‐interacting protein kinase (CIPK) and Ca2+‐sensing CBL partners (shown upon heterologous expression in Xenopus oocytes). It also displays distinctive features such as activation at much more negative membrane voltages or expression strongly sensitive to drought stress and ABA (upregulation in aerial parts, downregulation in roots). In roots, VvK1.1 is mainly expressed in cortical cells, like AKT1. In aerial parts, VvK1.1 transcripts were detected in most organs, with expression levels being the highest in the berries. VvK1.1 expression in the berry is localized in the phloem vasculature and pip teguments, and displays strong upregulation upon drought stress, by about 10‐fold.VvK1.1 could thus play a major role in K+ loading into berry tissues, especially upon drought stress.

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Section: Discussionmentioning

confidence: 99%

A grapevine Shaker inward K⁺channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

Cuéllar¹,

Pascaud²,

Verdeil³

et al. 2010

The Plant Journal

125

101

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“…During seed maturation, K concentrations in seeds decline significantly, which is paralleled by a huge assimilate transport from maternal plants to maturing seeds, which results in intensive seed‐mass growth. Zerche & Ewald (2005) also found that seed germination increased with decreasing seed K concentrations, making seed potassium a possible seed maturity indicator. At 8 weeks post anthesis, K concentrations in seeds varied between 200 and 300 µmol kg −1 DM, whereas in mature seeds K concentrations had declined to 150–200 µmol kg −1 DM.…”

Section: Floral and Seed Charactersmentioning

confidence: 94%

“…Analyses of seed development showed that endosperm was liquid up to 8 weeks post anthesis (Zerche & Ewald 2005). Solidification of the endosperm begins at 9 weeks post anthesis, when the embryo size reaches approximately 1.1-1.3 mm.…”

Section: Boydmentioning

confidence: 99%

Biological Flora of the British Isles: Primula vulgaris Huds. (P. acaulis (L.) Hill)

et al. 2009

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Summary1. This account presents information on all aspects of the biology of Primula vulgaris Huds. (Primrose) that are relevant to understanding its ecological characteristics and behaviour. The main topics are presented within the framework of the Biological Flora of the British Isles : distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characteristics, herbivores and disease, history and conservation. 2. Primula vulgaris is a native perennial herb with a very wide distribution in the British Isles. In many lowland areas it is essentially a plant of woodlands and hedgerows, although in the west it can occur abundantly in grasslands and other communities such as heaths. In northern and western Britain and Ireland, it may be frequent in open and even exposed habitats. Its distribution is linked with soil moisture and atmospheric humidity. It is shade tolerant, but it flowers most profusely in canopy gaps. 3. Primula vulgaris is a rosette hemicryptophyte that reproduces mainly through seeds. Vegetative spread is restricted and only occurs within very short distances from the mother plant through the production of lateral rosettes. Although individual rosettes may die, plants are relatively long-lived (life expectancy of a newborn individual: 48.3 years). The mean age at first flowering was 20 months. 4. Pollination is mainly by bumblebees and other bees, but other long-tongued pollinators including syrphids, bee-flies and even butterflies may be locally important. P. vulgaris is an obligate outbreeder, with two genetically determined self-incompatible morphs ('pin' and 'thrum'). A third morph ('homostyle' or 'long homostyle'), with a stigma like that of pin but anthers like that of thrum, has been found in Somerset and North Dorset. In years when pollinators are scarce, homostyles have higher reproductive success than pins and thrums, suggesting that reproductive assurance could have had a profound effect on the evolution of homostyly in P. vulgaris . 5. Seeds are dispersed by ants and rodents. Dispersal is usually restricted to a few centimetres or decimetres from maternal plants, resulting in significant fine-scale spatial genetic structure and small neighbourhood sizes. Pollen flow, on the other hand, is more extensive, but still limited to a few metres from paternal plants. 6. Populations of P. vulgaris have not changed markedly during the last century in most parts of Britain and Ireland and it is not threatened with extinction nationally. However, there is evidence †Correspondence author: E-mail: hans.jacquemyn@bio.kuleuven.be ‡Deceased *Nomenclature of vascular plants follows Stace (1997) and, for non-British species, Flora Europaea . that Primroses were formerly more widespread and have decreased with the decline of coppicing and pollarding. In East Anglia, woodland populations have declined greatly in response to a series of hot, dry summers since 1970. Small, isolated populations of P. vulgaris often show reduce...

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“…After 5 min incubation, P was determined at 440 nm using a V-550 spectrophotometer (Jasco GmbH, Gross-Umstadt, Germany). Results were calculated in mol P g −1 dry mass (DM) (Ehrenberger, 1991;Zerche and Ewald, 2005).…”

Section: P Analysismentioning

confidence: 99%

Effect of root colonization with Piriformospora indica and phosphate availability on the growth and reproductive biology of a Cyclamen persicum cultivar

Ghanem

Ewald

Zerche

et al. 2014

Scientia Horticulturae

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Seed Potassium Concentration Decline During Maturation Is Inversely Related to Subsequent Germination of Primrose

Cited by 12 publications

References 76 publications

A grapevine Shaker inward K⁺channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

A grapevine Shaker inward K⁺channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

Biological Flora of the British Isles: Primula vulgaris Huds. (P. acaulis (L.) Hill)

Effect of root colonization with Piriformospora indica and phosphate availability on the growth and reproductive biology of a Cyclamen persicum cultivar

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Seed Potassium Concentration Decline During Maturation Is Inversely Related to Subsequent Germination of Primrose

Cited by 12 publications

References 76 publications

A grapevine Shaker inward K+channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

A grapevine Shaker inward K+channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

Biological Flora of the British Isles: Primula vulgaris Huds. (P. acaulis (L.) Hill)

Effect of root colonization with Piriformospora indica and phosphate availability on the growth and reproductive biology of a Cyclamen persicum cultivar

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A grapevine Shaker inward K⁺channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions

A grapevine Shaker inward K⁺channel activated by the calcineurin B-like calcium sensor 1âprotein kinase CIPK23 network is expressed in grape berries under drought stress conditions