The objective of this study was the isolation and identificaion of essential oil constituents of Salvia sahendica. The antimicrobial activity of the essential oil was also investigated. The aerial parts of the plant were collected in different phenological stages in 2004 from Sahand Mountain (East Azerbayjan Province, Tabriz). The essential oil of S. sahendica was isolated by hydro-distillation...

Questions: We asked several linked questions about phenology and precipitation relationships at local, landscape, and regional spatial scales within individual seasons, between seasons, and between year temporal scales. (1) How do winter and summer phenological patterns vary in response to total seasonal rainfall? (2) How are phenological rates affected by the previous season rainfall? (3) How ...

BACKGROUND AND AIMS Ongoing global warming has been implicated in shifting phenological patterns such as the timing and duration of the growing season across a wide variety of ecosystems. Linear models are routinely used to extrapolate these observed shifts in phenology into the future and to estimate changes in associated ecosystem properties such as net primary productivity. Yet, in nature, l...

phase transition from vegetative to reproductive growth is an important character for winter wheat under cold conditions because it decreases the ability of wheat plants to maintain frost tolerance. reproductive development in winter wheat is triggered by fulfillment of vernalization requirements. this study was conducted to determine the inter-relationship between developmental stages and free...

The spatial and temporal distribution of forage quality is among the most central factors affecting herbivore habitat selection. Yet, for high latitude areas, forage quantity has been found to be more important than quality. Studies on large ungulate foraging patterns are faced with methodological challenges in both assessing animal movements at the scale of forage distribution, and in assessin...

Drought and floods affect the growth yield of maize, affecting food security. Therefore, it is crucial to assess maize’s drought waterlogging status in various stages. We used phenological daily meteorological data spatial analysis identify conditions spring maize Northeast China eight calculated crop water surplus/deficit index national standard for waterlogging. The results indicate a signifi...

Lettuce is a valuable leaf vegetable for well-balanced diet, since it rich in nutrient elements, has low calories and provides dietary antioxidants. Compared to soil-based cultivation, the hydroponic system an alternative associated with shortening of growing cycles reduction wasted water amount. The aim this study was analyze growth lettuce plants under soil cultivation systems, during three p...

The effect of leachates of different phenological stages of Cassia occidentalis L. on Parthenium hysterophorus L. was studied. Seed germination, radicle length, plumule length and fresh and dry weight of Parthenium were recorded. Pigments and protein contents were also measured to evaluate relation between biochemical and biophysical parameters of Parthenium under stress. The leaf leachate of C...

in order to study the genetic diversity of grapevine in mahneshan (zanjan) an experiment was performed during 2012 and 2013. in different phenological growth stages (bud burst, anthesis and fruit ripening) quantitative and qualitative characteristics of 12 genotypes (marageh, shahani, khalili, ag-ozom, germez keshmish, ag-keshmish, gara-keshmish, asghari, pert-pert, gezel-ozom and gandomeh) bas...