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Abscisic acid levels in maize seedlings under field conditions during cold periods in spring

100%

Janowiak F., Luck E., Dorffling K.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2002

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tom 481

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nr 1

Laboratory studies have showed higher ABA accumulation in seedlings of the chilling tolerant genotypes than in the sensitive ones during low temperature exposure. On the basis of these results the hypothesis was developed that chilling tolerance (CT) in maize is related to the ability for fast and pronounced formation and accumulation of ABA as a protective agent against chilling injury. Presented in the paper measurements of ABA levels in maize seedlings under complex field conditions during natural spring cold waves at two sites of Europe confirmed the results from growth rooms. The chilling tolerant maize lines accumulated under field conditions more ABA than the sensitive ones during spring cold periods. Moreover, the data from field conditions show that the ABA accumulation induced by low temperature is not directly related to chilling-induced water deficit.

2

Temporal variability of precipitation extremes in Estonia 1961–2008

80%

Paadam K., Post P.

Oceanologia

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2011

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tom 53

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nr (1-TI)

Daily precipitation data from 40 stations are used to investigate the temporal variability of precipitation extremes in Estonia. The period covered is 1961–2008, characterized by a uniformity of observational practice. Precipitation extremes are quantified by yearly and seasonal values of two different parameters: daycount indices based on 95th and 99th percentile thresholds. Trend significance was assessed with the Mann-Kendall test. Results show that the frequency of both indices has increased. No significant negative trends were found. An increase of 15.8 events over the 99th percentile per decade was observed for Estonia. The indices selected for this study may be called ‘soft’ climate extremes, but the number of such events is large enough to allow for meaningful trend analysis in a roughly half-century long time series.

3

Specificites regionales du periglaciaire d'altitude dans le domaine mediterraneen

80%

Raynal R.

Biuletyn Peryglacjalny

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1994

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tom 33

Ograniczanie wyników

1 Biuletyn Peryglacjalny

1 Oceanologia

1 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Dorffling K.

1 Janowiak F.

1 Luck E.

1 Paadam K.

1 Post P.

1 Raynal R.

1 2011

1 2002

1 1994

Abscisic acid levels in maize seedlings under field conditions during cold periods in spring

Temporal variability of precipitation extremes in Estonia 1961–2008

Specificites regionales du periglaciaire d'altitude dans le domaine mediterraneen