scholarly journals Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species

2020 ◽  
Vol 10 (16) ◽  
pp. 8793-8800
Author(s):  
Tong Zhang ◽  
Mengzhou Liu ◽  
Xudong Huang ◽  
Wei Hu ◽  
Ning Qiao ◽  
...  
Keyword(s):  
Seed Germination ◽  
Nitrogen Addition ◽  
Direct Effects ◽  
Grassland Species ◽  
Semi Arid

scholarly journals Mobilization and Role of Starch, Protein, and Fat Reserves during Seed Germination of Six Wild Grassland Species

2018 ◽  
Vol 9 ◽  
Author(s):  
Ming Zhao ◽  
Hongxiang Zhang ◽  
Hong Yan ◽  
Lu Qiu ◽  
Carol C. Baskin
Keyword(s):  
Seed Germination ◽  
Grassland Species ◽  
Fat Reserves

scholarly journals Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe

2015 ◽  
Vol 27 (3) ◽  
pp. 621-629 ◽  
Author(s):  
Junqiang Jia ◽  
Yunshe Dong ◽  
Yuchun Qi ◽  
Qin Peng ◽  
Xinchao Liu ◽  
...  
Keyword(s):  
Nitrogen Addition ◽  
Carbon Pools ◽  
Temperate Steppe ◽  
Vegetation Carbon ◽  
Semi Arid

Development in Cowpea (Vigna unguiculata). I. The Influence of Temperature on Seed Germination and Seedling Emergence

1996 ◽  
Vol 32 (1) ◽  
pp. 1-12 ◽  
Author(s):  
P. Q. Craufurd ◽  
R. H. Ellis ◽  
R. R. J. Summerfield ◽  
L. Menin
Keyword(s):  
Seed Germination ◽  
Vigna Unguiculata ◽  
Developmental Plasticity ◽  
Seedling Emergence ◽  
Genotypic Variation ◽  
Thermal Time ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Semi Arid

SUMMARYThe base (Tb), optimum (To) and ceiling (Tce) temperature for 50% seed germination and seedling emergence, and the thermal time at sub-optimal temperatures (θ1), were examined in experiments with a range of cowpea genotypes from different habitats and latitudes. There was substantial genotypic variation in seed germination for Tb and To, but not for Tce. There was no evidence that genotypes from semi-arid habitats had higher values of To or Tce, but estimates of Tb for seed germination were related to latitude and were highest in genotypes originating from close to the equator. The significance of these responses as a component of developmental plasticity in relation to the adaptation of cowpeas is discussed.

scholarly journals Seed germination and rising atmospheric CO2concentration: a meta-analysis of parental and direct effects

2014 ◽  
Vol 202 (2) ◽  
pp. 401-414 ◽  
Author(s):  
Charles Marty ◽  
Hormoz BassiriRad
Keyword(s):  
Seed Germination ◽  
Meta Analysis ◽  
Direct Effects

scholarly journals The Anthelmintic Ingredient Moxidectin Negatively Affects Seed Germination of Three Temperate Grassland Species

PLoS ONE ◽  
2016 ◽  
Vol 11 (11) ◽  
pp. e0166366 ◽  
Author(s):  
Carsten Eichberg ◽  
Manuel Wohde ◽  
Kerstin Müller ◽  
Anja Rausch ◽  
Christina Scherrmann ◽  
...  
Keyword(s):  
Seed Germination ◽  
Temperate Grassland ◽  
Grassland Species

scholarly journals Seed Germination of selected Taxa from Kachchh Desert, India

2010 ◽  
Vol 2 (2) ◽  
pp. 41-45 ◽  
Author(s):  
Vinay Madhukar RAOLE ◽  
Aruna Girish JOSHI ◽  
Sandhya Kiran GARGE ◽  
Rinku Jitendrakumar DESAI
Keyword(s):  
Seed Germination ◽  
Growth Regulators ◽  
Seed Coat ◽  
Native Species ◽  
Arid Regions ◽  
Conservation Status ◽  
Storage Period ◽  
The Other ◽  
Viable Seeds ◽  
Semi Arid

The district of Kachchh contains many culturally important plants. However, their conservation status is little known due to direct and indirect human activities. This study was undertaken with the aim of contributing to the conservation of the native species of these semi-arid regions through germination trials under laboratory conditions. Mature fruits of ten selected species were collected randomly from the known habitats to obtain viable seeds. These seeds were pre-treated with growth regulators singly or in combination after acid scarification or without scarification. Seeds were found to be dormant due to presence of thick seed coat or due to low level of endogenous hormonal level. Most of these seeds required different storage period to mature. Only seeds of Capparis cartilaginea germinated without treatment while the other species required treatments. Addition of growth regulators has enhanced seed germination in few taxa singly and in some plant cases in combination.

Impacts of warming and nitrogen addition on soil autotrophic and heterotrophic respiration in a semi-arid environment

2018 ◽  
Vol 248 ◽  
pp. 449-457 ◽  
Author(s):  
Chao Fang ◽  
Fengmin Li ◽  
Jiuying Pei ◽  
Jiao Ren ◽  
Yanhong Gong ◽  
...  
Keyword(s):  
Nitrogen Addition ◽  
Arid Environment ◽  
Heterotrophic Respiration ◽  
Semi Arid

scholarly journals Does seed modification and nitrogen addition affect seed germination of Pulsatilla grandis?

2017 ◽  
Vol 48 (4) ◽  
pp. 216-223
Author(s):  
M. Bochenková ◽  
P. Karlík ◽  
M. Hejcman ◽  
P. Jiras
Keyword(s):  
Seed Germination ◽  
Nitrogen Addition ◽  
N Deposition ◽  
Atmospheric Nitrogen ◽  
The Czech Republic ◽  
Large Cities ◽  
Low Concentrations ◽  
Negative Effect ◽  
Nitrogen Concentrations ◽  
Positive Effect

Abstract Pulsatilla grandis is an endangered species in the Czech Republic and is protected in whole Europe because the number of its populations is declining. One of the possible causes is the deposition of atmospheric nitrogen. In our research, we investigated how nitrogen concentrations and seed appendage removal directly affect the species’ seed germination.Seeds were allowed to germinate under laboratory conditions in water solutions of NH4NO3 ranging in concentration from 0 to 4239 mg N l-1. They were able to germinate up to the concentration of 848 mg N l-1 even when covered with mycelium, which supports the idea that they can tolerate being strongly infected by fungi. We also found a significant positive effect of seed appendage removal on seed germination. Seeds without appendages germinated, on the average, with 11% greater probability, compared to seeds with appendages. We conclude that the germination of P. grandis is not directly affected by high N concentrations in rain water, which can range from 10 to 13 mg N l-1 near large cities. Surprisingly, low concentrations of N (up to 34 mg N l-1) might even slightly support the seed germination of P. grandis. The negative effect of N deposition on seeds is indirect and acts in conjunction with the absence of management at localities.

scholarly journals Nitrogen addition pulse has minimal effect in big sagebrush (Artemisia tridentata) communities on the Pinedale Anticline, Wyoming (USA)

2018 ◽  
Author(s):  
Christopher W. Beltz ◽  
Megan L. Mobley ◽  
Ingrid C. Burke
Keyword(s):  
Artemisia Tridentata ◽  
Forage Quality ◽  
Single Pulse ◽  
Nitrogen Addition ◽  
Arid Ecosystems ◽  
Available Nitrogen ◽  
Big Sagebrush ◽  
The Impact ◽  
Nitrogen Additions ◽  
Semi Arid

ABSTRACTNitrogen additions are known to elicit variable responses in semi-arid ecosystems, with responses increasing with precipitation. The response of semi-arid ecosystems to nitrogen are important to understand due to their large spatial extent worldwide and the global trend of increasingly available nitrogen. In this study, we evaluated the impact of a single nitrogen addition pulse on a semi-arid big sagebrush (Artemisia tridentata) ecosystem in western Wyoming. This is important given that sagebrush ecosystems are poorly understood, despite their prevalence in the western US. In addition, large-scale nitrogen additions have begun on sagebrush landscapes in Wyoming in order to mitigate population declines in mule deer (Odocoileus hemionus). The study objectives were (1) to evaluate the effectiveness of a nitrogen fertilization pulse in increasing sagebrush biomass and forage quality, and (2) to assess effects of nitrogen addition on soil biogeochemistry and vegetation community structure. We fertilized 15 plots across 5 locations in western Wyoming using a single pulse of urea (5.5g N m−2). In addition, we immobilized available nitrogen through surface hay treatments (250g hay/m2). Nitrogen additions failed to increase growth of sagebrush, alter nitrogen content of sagebrush leaders, or alter greenhouse gas efflux from soils. The plant community also remained unchanged; total cover, species richness, and community composition were all unaffected by our treatment application. Over the two years of this study, we did not find indications of nitrogen limitation of ecosystem processes, despite a wet growing season in 2014. Thus, we have found a general lack of response to nitrogen in sagebrush ecosystems and no treatment effect of a single pulse of N to sagebrush biomass or forage quality.

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