STRESS RESPONSES OF THE CHERRY DWARF ROOTSTOCK GISELA 5 - Prunus cerasus L.× Prunus canescens L. AFTER TREATMENT WITH SOIL HERBICIDES: I. EFFECT ON THE PHOTOSYNTHESIS AND CHLOROPHYLL FLUORESCENCE | СТРЕС РЕАКЦИИ НА ЧЕРЕШОВАТА ПОДЛОЖКА GISELA 5 - Prunus cerasus L.× Prunus canescens L. СЛЕД ТРЕТИРАНЕ С ПОЧВЕНИ ХЕРБИЦИДИ: I. ВЛИЯНИЕ ВЪРХУ ФОТОСИНТЕЗАТА И ХЛОРОФИЛНАТА ФЛУОРЕСЦЕНЦИЯ
2012
Nacheva, L., Fruit Growing Institute, Plovdiv (Bulgaria) | Rankova, Z., Fruit Growing Institute, Plovdiv (Bulgaria) | Gercheva, P., Fruit Growing Institute, Plovdiv (Bulgaria) | Zlatev, Z., Agricultural University, Plovdiv (Bulgaria)
The aim of the present study was to investigate the stress responses of the vegetative rootstock Gisela 5 after treatment with soil herbicides under the conditions of a model pot experiment. The following variants were set: 1. control /untreated/; 2. pendimethalin – Stomp 33 ЕC – 400 ml/da; 3. isoxaflutole – Merlin 750 WG – 5,0 g/da; 4. oxyfluorfen – Goal 2Е – 200 ml/da. Investigations on the gas exchange rate and the chlorophyll fluorescence after herbicide treatment were carried out. The obtained results showed that the soil herbicides pendimethalin, isoxaflutole and oxyfluorfen had a negative impact on the gas exchange rate, lowering the maximal and variable chlorophyll fluorescence, which confirmed the existence of stress responses.
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