Wyniki wyszukiwania - Biblioteka Nauki

1

Phenological stage and composition of mite fauna of 'Siem' [Citrus reticulata Blanco] citrus

100%

Affandi B.

Journal of Fruit and Ornamental Plant Research

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2007

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tom 15

2

A comparative analysis of dynamics of stem growth and phenological stages of Rubus species in cultivation

86%

Kluza-Wieloch M. , Maciejewska-Rutkowska I.

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana

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2013

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tom 17

EN

In recent years extensive attention has been given to the Rubus genus, but knowledge on the ecology of most of its species, including rhythmic development, is still insuffi cient. Such data may have practical applications, since blackberry species are economically important. The goal of the study was to analyse phenology and growth rate of vegetative and generative stems in 10 Rubus species of different systematic affi nity (belonging to two subspecies and three sections), growing in the Dendrological Garden of the Poznań University of Life Sciences. Some habitat factors were also taken into consideration. Field investigations were carried out for three growing seasons. The plants were evaluated for phenology twice a week, while the length of their stems was measured once a week. Diff erences were observed in the seasonal rhythm of individual species. Weather factors distinctly infl uenced the course of development phases in all the Rubus species. Drought during the growing season caused fl owering disorders, withering of fruit, earlier autumn leaf coloration, and fall of leaves. Rubus idaeus and R. fabrimontanus ripened all of their fruits each year of observations and seemed to be the most adapted for fruit production. Rubus fabrimontanus, R. kuleszae and R. praecox were the most vigorous species with reference to shoot growth. This study revealed that only some species were fully acclimated to the conditions of the Dendrological Garden, since they successfully completed their entire fl owering and fruiting cycles.

3

Results obtained on the efficacy of 6-BA alone, and in combination with other thinning agents from different apple producing areas of Northern Italy

86%

Bregoli A. M. , Fabbroni C. , Vancini R. , Galliano A. , Costa G.

Journal of Fruit and Ornamental Plant Research

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2006

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tom 14

4

Leaf nutrient status of ‘Trakya İlkeren’ grape variety (Vitis vinifera L.) in different phenological stages

72%

Kose B. , Horuz A. , Akinoglu G.

Acta Scientiarum Polonorum. Hortorum Cultus

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2018

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tom 17

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nr 4

EN

Nutrition of grapevines is very sensitive issue in vineyards. Soil quality is very important matter for growth and quality in vine growing. Rootstocks affect the growth and productivity of grapevine as well as increase or decrease of the nutrient uptake. The present study was conducted to determine the phenological changes of nutrient uptakes in 10 years ‘Trakya İlkeren’ grape variety (Vitis vinifera L.) in the heavy clay soil conditions. The grapevines are grown on 5BB and 5C rootstocks. The changes of macro and micronutrients in leaf blades from bud burst to post harvest period were investigated in the experiment. Leaf nutrient contents of leaf blades show varied depending on the phenological stages and rootstocks (P < 0.01 and P < 0.05). Nitrogen and phosphorus content of leaf blade was decreased until veraison stage for both rootstocks. The highest potassium (K) content was obtained at blooming stage. In blooming stage nitrogen (N), phosphorus (P), potassium (K) and magnesium (Mg) nutrients was found high on 5C rootstock whereas calcium (Ca) was high on 5BB. Grapevines were found insufficient for P, K and Mg nutrients in the study. Total chlorophyll and chlorophyll a/b ratio showed significantly varied among to rootstocks and phenological stages (P < 0.01). While the highest leaf chlorophyll content was measured during flowering period it was found at the lowest through to harvest on both rootstocks. Overall total chlorophyll contents and chlorophyll a/b ratio were significantly higher on 5BB grafted vines. In the research, 5C was found to be more successful rootstock than 5BB for nutrient uptakes.

5

Effectiveness of Puccinia recondita f. sp. tritici resistance genes at different phenological stages of winter wheat

72%

Liatukas Z. , Ruzgas V.

Journal of Plant Protection Research

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2006

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tom 46

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nr 2

121-131

EN

The resistance of winter wheat varieties to Puccinia recondite f. sp. tritici was investigated at the Lithuanian Institute of Agriculture during 2001–2003. Effectiveness of resistance genes was investigated at seedling, tillering and adult plant stages. Virulence tests done during the 2000–2003 period showed that the majority of Lr genes used in European wheat were not sufficiently efficient. However, testing of cultivars at the first leaf stage revealed that the Lr37 gene in combination with the other genes was very effective. The experimental cultivars were sown in 2 times: in autumn and spring, without vernalization. The main task of spring-sown nursery was to improve the effectiveness of the experiment and investigate the effect of different Lr genes of non-vernalized plants at tillering growth stage. The Lr37 gene was found to be the most effective at both adult plant stage and tillering growth stage. Disease severity and plant resistance type at tillering stage were stable in all experimental years, which is important for the breeding program. The investigations revealed that the correlations between resistance at seedling and the other two stages were up to r = 0.81 (significant at p = 0.01**). The correlations between leaf rust severity and varietal resistance type at tillering were very high (r = 0.86–0.91**) in the same year. The correlation of leaf rust severity at adult plant stage was strong (r = 0.78**) between 2001 and 2002, but too low for reliable selection of resistant cultivars in the other years. Spring-sown nursery was complementary to collect resistance data in the years unfavourable for leaf rust development.

PL

W Litewskim Instytucie Rolniczym badano w latach 2001–2003 odporność odmian pszenicy ozimej na rdzę brunatną (Puccinia recondita f. sp. tritici). Badania efektywności genów odporności prowadzono w fazach siewki, krzewienia oraz na roślinach dorosłych. Testy wirulencji wykonane w trzech latach prowadzenia doświadczeń na 24 odmianach pszenicy ozimej oraz 8 izogenicznych liniach odmiany Thatcher wykazały, że większość genów Lr wykorzystywanych w hodowli europejskich odmian nie była wystarczająco skuteczna. Jednak w toku prowadzenia atestacji odmian w fazie 1. liścia wykazano, że łączne wykorzystanie genu Lr37 z innymi genami odporności było bardzo efektywne. Gen Lr37 był najbardziej efektywny zarówno w fazie krzewienia jak i na roślinach dorosłych. Nasilenie choroby i typ odporności w fazie krzewienia były stabilne we wszystkich latach badań, co jest ważne z punktu widzenia programu hodowlanego. Badania wykazały, że współczynniki korelacji pomiędzy odpornością w fazie siewki i dwoma pozostałymi fazami rozwojowymi osiągnęły wartości do r = 0,81 (istotne przy p = 0,01**). Współczynniki korelacji pomiędzy porażeniem roślin w fazie krzewienia a typem odporności odmian w danym roku badań były bardzo wysokie (r = 0,86–0,91**). Korelacja nasilenia porażenia rdzą brunatną w fazie rośliny dorosłej pomiędzy latami 2001 i 2002 była wysoka (r = 78**), ale jednak niewystarczająca, aby można było oprzeć się na niej przy selekcjonowaniu odmian odpornych w innych latach.