Seasonal Pattern of Photosynthesis in Individual Grass Leaves and Other Plant Parts in Arctic Alaska with a Portable14CO2System

1975 ◽  
Vol 136 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Larry L. Tieszen ◽  
Douglas A. Johnson
Keyword(s):  
Seasonal Pattern ◽  
Plant Parts ◽  
Arctic Alaska

Carbon resource sharing and rhizome expansion of Phalaris aquatica plants in grazed pastures

2005 ◽  
Vol 32 (1) ◽  
pp. 79 ◽  
Author(s):  
Brendan R. Cullen ◽  
David F. Chapman ◽  
Paul E. Quigley
Keyword(s):  
Resource Sharing ◽  
Seasonal Pattern ◽  
Soil Surface ◽  
Deep Roots ◽  
Phalaris Aquatica ◽  
Plant Parts ◽  
Grazed Pastures ◽  
Below Ground ◽  
Grazing Systems ◽  
Western Victoria

The patterns of carbon (C) resource sharing and new rhizome development in phalaris (Phalaris aquatica L. cv. Australian) were examined in grazed pastures in western Victoria. The seasonal pattern of new rhizome growth was similar under the four grazing systems tested. New rhizome production was infrequent but concentrated in winter. The phalaris plants maintained more than 1600 kg DW ha–1 of non-assimilating material beneath the soil surface (0–5 cm). Gaseous 14C was fed into plants in the field to determine if these below ground structures continued to be supported by the C assimilating tillers. The results indicated that the primary tiller does provide C to support the growth of secondary and tertiary tillers derived from its axillary buds. There was some evidence that C was exported from the fed tiller to non-assimilating plant structures. The old reproductive tiller bases (from which the assimilating tillers originate) received some C support, suggesting that this was maintained because it had deep roots attached. C export to older plant parts declined, which may lead to plant fragmentation.

scholarly journals Phenolic Compounds in Wetland Macrophytes

2018 ◽  
Vol 49 (1) ◽  
pp. 1-8
Author(s):  
T. Dvořáková Březinová ◽  
J. Vymazal
Keyword(s):  
Phenolic Compounds ◽  
Higher Plants ◽  
Negative Impact ◽  
Seasonal Pattern ◽  
Plant Secondary Metabolites ◽  
Decomposition Rates ◽  
The Czech Republic ◽  
Harvesting Time ◽  
Spectrophotometric Methods ◽  
Plant Parts

Abstract Phenolics are the most widely distributed class of plant secondary metabolites and higher plants are able to produce several thousand different phenolic compounds. It has been reported that phenolics are more resistant to decomposition due to the negative impact on the microorganisms involved. Therefore, it may be hypothesized that the higher content of phenolics in plant tissue may cause slower decomposition rates and potentially higher carbon sequestration in the soil. The primary goal of this study was to evaluate and compare the content of phenolics in seven common macrophytes in the Czech Republic. Aboveground biomass was sampled in June 2016 at seven different localities and phenolics concentrations determined by spectrophotometric methods according to the Folin-Cioacalteau method ranged from 9.02 to 28.39 g kg−1 dry biomass weight (DW). Several plants were also harvested in August, October and December in order to follow a seasonal pattern. According to the results it seems that surveyed macrophytes vary widely in phenolics concentrations in relation to sampled site, harvesting time, plant species, and plant parts as well.

Seasonal Variation of Suicide in the City of São Paulo, Brazil, 1996–2010

Crisis ◽  
2014 ◽  
Vol 35 (1) ◽  
pp. 5-9 ◽  
Author(s):  
Daniel Hideki Bando ◽  
Fernando Madalena Volpe
Keyword(s):  
Seasonal Pattern ◽  
Total Sample ◽  
Sao Paulo ◽  
Seasonal Patterns ◽  
São Paulo ◽  
Health Statistics ◽  
Males And Females ◽  
June July ◽  
The City ◽  
Over Time

Background: In light of the few reports from intertropical latitudes and their conflicting results, we aimed to replicate and update the investigation of seasonal patterns of suicide occurrences in the city of São Paulo, Brazil. Methods: Data relating to male and female suicides were extracted from the Mortality Information Enhancement Program (PRO-AIM), the official health statistics of the municipality of São Paulo. Seasonality was assessed by studying distribution of suicides over time using cosinor analyses. Results: There were 6,916 registered suicides (76.7% men), with an average of 39.0 ± 7.0 observed suicides per month. For the total sample and for both sexes, cosinor analysis estimated a significant seasonal pattern. For the total sample and for males suicide peaked in November (late spring) with a trough in May–June (late autumn). For females, the estimated peak occurred in January, and the trough in June–July. Conclusions: A seasonal pattern of suicides was found for both males and females, peaking in spring/summer and dipping in fall/winter. The scarcity of reports from intertropical latitudes warrants promoting more studies in this area.

Total phenol and flavonoid contents of extracts from different plant parts of Teucrium montanum L.

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
M Stankovic ◽  
M Topuzovic ◽  
S Solujic ◽  
D Pavlovic ◽  
A Markovic ◽  
...  
Keyword(s):  
Total Phenol ◽  
Plant Parts

Pharmacognostic Comparision of Wild and Cultivated Solanum melongena L., Different Plant Parts Used in Ayurveda

Planta Medica ◽  
2011 ◽  
Vol 77 (05) ◽  
Author(s):  
JRA Gomes ◽  
KSS Sugathadasa ◽  
LP Jayatissa ◽  
R Samarasekera
Keyword(s):  
Solanum Melongena ◽  
Plant Parts

Isoflavone profiles in different plant parts of red clover

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
M Bursac ◽  
M Atanackovic ◽  
J Cvejic ◽  
S Vasiljevic
Keyword(s):  
Red Clover ◽  
Plant Parts

Seroprevalence of Enterically Transmitted Hepatitis in North West India

2016 ◽  
Vol 1 (2) ◽  
pp. 29
Author(s):  
Rekha Bachhiwal ◽  
Rajni Sharma ◽  
Pooja Gupta ◽  
Jyotsna Shukla
Keyword(s):  
Hepatitis A ◽  
Seasonal Pattern ◽  
Tertiary Care ◽  
Hepatitis E ◽  
Care Hospital ◽  
Subacute Hepatitis ◽  
North West ◽  
Pediatric Age Group ◽  
Male Preponderance ◽  
Current Infection

Introduction: To ascertain the seroprevalence of enterically transmitted Hepatitis A (HAV) and Hepatitis E (HEV) in cases with acute/subacute hepatitis attending a tertiary care hospital in North West India. Methods: A total of 2936 cases were examined for the presence of current infection with HAV and HEV, determined by demonstration of HAV-IgM and HEV-IgM antibodies using ELISA. Results: Overall seroprevalence for enterically transmitted hepatitis was found to be 24.89%. HAV IgM was present in 7.35% and HEV IgM was present in 17.54% of total cases. HAV infection was predominantly found in pediatric age group while HEV infection was mostly seen among adults. Male preponderance was noted. Enteric hepatitis cases occurred throughout the year. No definitive seasonal pattern was observed. Conclusion: Our data demonstrated high seropositivity of enterically transmitted hepatitis indicating the need for improvement in personal and public hygiene, and development of HEV vaccine.

The Stock Market’s ‘Seasonal Pattern’

1964 ◽  
Vol 20 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Edward D. Zinbarg ◽  
John J. Harrington
Keyword(s):  
Seasonal Pattern
Sign in / Sign up

Export Citation Format

Share Document