Interactive effects of seaweed and microalga extract priming as a biostimulant agent on the seed germination indices and primary growth of milkweed (Calotropis procera Ait.)

Biologia ◽  
2022 ◽  
Author(s):  
Mohammad Bahmani Jafarlou ◽  
Babak Pilehvar ◽  
Mohammad Modaresi ◽  
Mehdi Mohammadi
Keyword(s):  
Seed Germination ◽  
Interactive Effects ◽  
Calotropis Procera ◽  
Primary Growth ◽  
Germination Indices

Effect of salinity and temperature on seed germination indices of Zinnia elegans L.

2011 ◽  
Vol 13 (01) ◽  
pp. 48-51 ◽  
Author(s):  
S. Zivdar ◽  
E. Khaleghi ◽  
F. Sedighi Dehkordi
Keyword(s):  
Seed Germination ◽  
Zinnia Elegans ◽  
Germination Indices

Interactive Effects of Salt and Drought Stresses on Seed Germination of Ammopiptanthus mongolicus in Northwest China

2014 ◽  
Vol 614 ◽  
pp. 653-657 ◽  
Author(s):  
Xiao Xue Shen ◽  
Min Wei Chai ◽  
Rui Li Li ◽  
Guo Yu Qiu
Keyword(s):  
Drought Stress ◽  
Seed Germination ◽  
Constant Temperature ◽  
Germination Rate ◽  
Northwest China ◽  
Interactive Effects ◽  
Regression Coefficients ◽  
Ammopiptanthus Mongolicus ◽  
Salt And Drought Stresses

A study quantifying the role of the interactive effects of salt and drought stresses, generally co-occurred in deserts, on seed germination in Ammopiptanthus mongolicus was conducted in a constant temperature incubator. The experiment consisted of seven levels of salinity stress (0, 0.3, 0.6, 0.9, 1.2, 1.5 and 1.8% NaCl) as well as six drought stress levels (0, -0.2, -0.4, -0.8, -1.6 and-2.0 MPa PEG). Accordant to our expectations, the interactive effects of salinity and drought stresses were additive on seed germination percentages, germination rate, and germination energy; significant decreases were seen in all of them in response to increases in salt and/or drought stresses. Furthermore, regression coefficients of salinity (β1) were higher than drought (β2), indicating that salinity was the first factor, and drought was secondary for salt and drought mixed stresses.

scholarly journals Seed Germination in Six Anticancerous Plants of Bangladesh

2019 ◽  
Vol 45 (2) ◽  
pp. 151-159
Author(s):  
Nahid Sultana ◽  
M Oliur Rahman ◽  
Md Abul Hassan
Keyword(s):  
Seed Germination ◽  
Ricinus Communis ◽  
Germination Rate ◽  
Calotropis Procera ◽  
Time Rate ◽  
Plumbago Zeylanica ◽  
Ricinus Communis L ◽  
Jatropha Gossypifolia ◽  
Leonurus Sibiricus ◽  
Boerhavia Diffusa

Six medicinal plants, namely Boerhavia diffusa L., Calotropis procera (Ait.) R. Br., Jatropha gossypifolia L., Leonurus sibiricus L., Plumbago zeylanica L. and Ricinus communis L. of Bangladesh having anticancerous properties were investigated with a view to knowing their seed germination time, rate and pattern. The minimum days taken for seed germination in B. diffusa, C. procera, J. gossypifolia, L. sibiricus, P. zeylanica and R. communis were 70, 9, 24, 75, 11 and 14, respectively. The maximum time (130 days) required for germination was observed in Leonurus sibiricus. The highest germination rate (100%) was observed in Plumbago zeylanica, while the lowest rate (10%) was found in Ricinus communis. Epigeal type of germination was noted in all the species employed. Asiat. Soc. Bangladesh, Sci. 45(2): 151-159, December 2019

Interactive effects of Epichloë fungal and host origins on the seed germination of Achnatherum inebrians

Symbiosis ◽  
2019 ◽  
Vol 79 (1) ◽  
pp. 49-58 ◽  
Author(s):  
Gensheng Bao ◽  
Meiling Song ◽  
Yuqin Wang ◽  
Kari Saikkonen ◽  
Hongsheng Wang
Keyword(s):  
Seed Germination ◽  
Interactive Effects ◽  
Achnatherum Inebrians

An Index Model for Predicting Seed Germination and Emergence Rates

1993 ◽  
Vol 7 (3) ◽  
pp. 560-569 ◽  
Author(s):  
David M. Alm ◽  
Edward W. Stoller ◽  
Loyd M. Wax
Keyword(s):  
Seed Germination ◽  
Germination Rate ◽  
Soybean Seeds ◽  
Temperature Index ◽  
Water Index ◽  
Index Model ◽  
Emergence Rate ◽  
Germination Temperature ◽  
Petri Dishes ◽  
Germination Indices

We present a germination and emergence model that can be used as a sub-model in an individual-based model of population dynamics. Seed germination and seedling elongation rates were measured in petri dishes in the laboratory for ivyleaf morningglory, velvetleaf, corn, and soybean seeds, as functions of temperature and water potential. The analysis yielded a set of indices: the germination temperature index (GTI), the germination water index (GWI), the emergence temperature index (ETI), and the emergence water index (EWI). The seed populations were divided into 100 discrete cohorts, with each cohort (i), having its own germination rate (GR) as the product of a reference rate and the germination indices, or GRi= GRiREF× GTI × GWI. After germination, the emergence rate (ER) was the product of a reference rate and emergence indices, or ERi= ERREF× ETI × EWI. The model was tested against the timing of emergence in the field for seeds planted 1, 2, 4, and 8 cm deep in natural or rain-excluded environments. The predictions were more accurate for all depths combined than for any particular depth.

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