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Diverse strategies of rhododendron (Rhododendron sp.) genotypes in the water shortage management

100%

Ferus P., Bosakova D., Konopkova J., Hotka P.

Acta Scientiarum Polonorum. Hortorum Cultus

2020

tom 19

nr 3

Rhododendrons in numerous gardens in Central Europe are frequently endangered by adverse summer drought periods associated with the climate change. Therefore, in this work drought-resistance strategies in recent genotypes of these highly aesthetic shrubs were investigated. Dehydrated Rhododendron groenlandicum ‘Helma’, R. obtusum ‘Michiko’ and R. hybridum ‘Polarnacht’ showed high initial stomatal conductances (gS ), after few days steeply falling to the stable minimum at ca. 20, 85 and 70% leaf relative water content (RWC), respectively. Except of ‘Polarnacht’, they had relatively large specific leaf area and ‘Michiko’ also free proline accumulation. On the other hand, R. repens ‘Scarlet Wonder’ and R. hybridum ‘Red Jack’ started with half gS values, continuously declining 1.5–2 fold longer compared to the first group of genotypes (RWC of ca. 60 and 75%, respectively). Both produced relatively thick leaves but did not show any osmotic adjustment. Among observed drought-resistance strategies, lower and longer period active transpiration with stomata sensitive to the water loss, as found in R. repens ‘Scarlet Wonder’ and R. × hybridum ‘Red Jack’, were accepted as the most effective for drought-affected rhododendron plantations.

Screening for drought resistance among ornamental maples (Acer sp.). A field experiment in juvenile plants

100%

Oravec A., Ferus P., Kosutova D., Konopkova J.

Dendrobiology

2023

tom 89

Allelopathic interactions of invasive black locust (Robinia pseudoacacia L.) with secondary aliens: the physiological background

76%

Ferus P., Bosiakova D., Konopkova J., Hotka P., Kosa G., Melnykova N., Kots S.

Acta Physiologiae Plantarum

2019

tom 41

nr 11

Despite of numerous benefits, black locust (Robinia pseudoacacia L.) is an invasive tree species in Slovakia and Hungary. Recently, secondary local invasions of black locust plantations by black cherry (Prunus serotina Ehrh.) and common hackberry (Celtis occidentalis L.) have been observed in these countries. In this study, we describe these unique tree-to-tree interactions directly in the field as well as simulated in the laboratory (1% water extracts from leaves and twigs applied on leaf and soil). In the field, we observed no effect on tree height and trunk diameter as well as leaf metabolic parameters caused by black cherry. However, the laboratory experiment showed a reduction in nodulation, and thus N fixation rate per plant, which did not mirror in the shoot and root dry matter (DM) production. On the other hand, common hackberry significantly affected tree height as well as leaf amino acid and total nitrogen concentration, but not the content of soluble sugars and hydrogen peroxide in the field. The laboratory experiment revealed significant reductions in nodulation, N fixation rate per plant, shoot and root DM and leaf hydrogen peroxide, nevertheless, a noticeable soluble protein accumulation. Thus, we can conclude that common hackberry, but not black cherry, can effectively suppress black locust N metabolism and growth.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Dendrobiology

3 Ferus P.

3 Konopkova J.

2 Hotka P.

1 Bosakova D.

1 Bosiakova D.

1 Kosa G.

1 Kosutova D.

1 Kots S.

1 Melnykova N.

1 Oravec A.

1 2023

1 2020

1 2019

Wyniki wyszukiwania

Diverse strategies of rhododendron (Rhododendron sp.) genotypes in the water shortage management

Screening for drought resistance among ornamental maples (Acer sp.). A field experiment in juvenile plants

Allelopathic interactions of invasive black locust (Robinia pseudoacacia L.) with secondary aliens: the physiological background