Amino acid content and biomass productivity of selected weed species as an indicator of their response to herbicide stress

• Autorzy: Kieloch R. , Sadowski J. , Domaradzki K.

Warianty tytułu

PL

Zawartość aminokwasów i produktywność biomasy wybranych gatunków chwastów jako wskaźnik ich reakcji na stres herbicydowy

• Języki publikacji: EN

Abstrakty

EN

Biomass reduction and amino acid content in plants of Papaver rhoeas L. and Stellaria media L. were investigated to evaluate response of these species to herbicide stress under various temperature (25/16 and 8/2 oC) and relative humidity (50 and 75%) regimes. Weeds were treated with tribenuron methyl (15 g × ha-1), a mixture of 2.4-D with florasulam (180 + 3.75 g × ha-1), and a mixture of 2.4-D with dicamba (1252.5 + 97.5 g × ha-1). The fresh weight of weeds and the content of free branched-chain amino acids (valine, leucine and isoleucine) in plant tissue were recorded. Tribenuron methyl was the herbicide that most limited biomass productivity, regardless of weed species and climate conditions. S. media was more sensitive to herbicides than P. rhoeas. Weed response to herbicides was dependent on temperature, but not on relative humidity. Tribenuron methyl applied to both weed species under various temperature regimes caused significant amino acid deficiency. The reduction in amino acid content in plants of P. rhoeas was greater at warm temperature compared to the cold regime due to stronger reaction to tribenuron methyl applied under these conditions. In most of cases, the mixture of 2.4-D + dicamba induced overproduction of amino acids.

PL

W pracy określono redukcję biomasy oraz zawartość aminokwasów w roślinach Papaver rhoeas L. i Stellaria media L. w celu oceny reakcji tych gatunków na stres herbicydowy w zróżnicowanych warunkach temperatury (25/16 i 8/2 oC) i względnej wilgotności powietrza (50 i 75%). Rośliny potraktowano tribenuronem metylu (15 g × ha-1), mieszaniną 2,4-D z florasulamem (180 + 3,75 g × ha-1) i mieszaniną 2,4-D z dikambą (1252,5 + 97,5 g × ha-1). Określono świeżą masę chwastów i zawartość wolnych aminokwasów o łańcuchach rozgałęzionych (waliny, leucyny i izoleucyny) w ich tkankach. Herbicydem najsilniej ograniczającym produktywność biomasy był tribenuron metylu, niezależnie od gatunku chwastu oraz czynnika klimatycznego. S. media była bardziej wrażliwa na herbicydy niż P. rhoeas. Reakcja chwastów była zależna od temperatury, natomiast nie była zależna od wilgotności powietrza. Tribenuron metylu zastosowany w zróżnicowanych warunkach temperaturowych spowodował znaczący ubytek zawartości aminokwasów w obu gatunkach chwastów. Redukcja zawartości aminokwasów w roślinach P. rhoeas była większa w warunkach ciepłych w porównaniu z chłodnymi, z powodu silniejszej reakcji na tribenuron metylu aplikowany w tych warunkach. W większości przypadków, mieszanina 2,4-D + dikamba wywoływała zwiększoną produkcję aminokwasów.

• Wydawca: -
• Czasopismo: Acta Agrobotanica
• Rocznik: 2013
• Tom: 66
• Numer: 3
• Opis fizyczny: p.81-87,ref.

Twórcy

autor

Kieloch R.

• Institute of Soil Science and Plant Cultivation, State Research Institute, Orzechowa 61, 50-540 Wroclaw, Poland

autor

Sadowski J.

• Institute of Soil Science and Plant Cultivation, State Research Institute, Orzechowa 61, 50-540 Wroclaw, Poland

autor

Domaradzki K.

• Institute of Soil Science and Plant Cultivation, State Research Institute, Orzechowa 61, 50-540 Wroclaw, Poland

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