scholarly journals Arabidopsis seed germination speed is controlled by SNL histone deacetylase-binding factor-mediated regulation of AUX1

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Zhi Wang ◽  
Fengying Chen ◽  
Xiaoying Li ◽  
Hong Cao ◽  
Meng Ding ◽  
...  
Keyword(s):  
Seed Germination ◽  
Histone Deacetylase ◽  
Arabidopsis Seed ◽  
Binding Factor ◽  
Germination Speed

Chitosan coating on bean and maize seeds: release of agrochemical fungicide and post-storage condition

2021 ◽  
Vol 43 ◽  
Author(s):  
Nancy Araceli Godínez-Garrido ◽  
Juan Gabriel Ramírez-Pimentel ◽  
Jorge Covarrubias-Prieto ◽  
Francisco Cervantes-Ortiz ◽  
Artemio Pérez-López ◽  
...  
Keyword(s):  
Seed Germination ◽  
Defense Mechanisms ◽  
Germination Rate ◽  
Storage Condition ◽  
Germination Percentage ◽  
Negative Effects ◽  
Retention Capacity ◽  
Chitosan Coating ◽  
Maize Seeds ◽  
Germination Speed

Abstract: Chitosan is a biopolymer obtained from deacetylation of chitin; it has multiple applications in agriculture as an antifungal, soil conditioner, inducer of defense mechanisms, fruits postharvest coating, leaves and seeds, among others. The objective in this research was to evaluate the effect of chitosan coatings mixed with fungicide (dithiocarbamate) on the germination and germination speed of bean and maize seeds in storage and to determine the retention capacity of the fungicide in the coated seeds under different times of imbibition. Two coating treatments at concentrations of 0.1 and 0.5% chitosan in water, two coatings treatments at 0.1 and 0.5% chitosan supplemented with 0.5% fungicide and a coating without chitosan using only 0.5% fungicide in water were used in bean and maize seed; and as control seeds imbibed in distilled water were used; after treatments, germination percentage and germination speed were determined, also fungicide release were determined at 0, 1, 2 and 6 h of imbibition, and the effect of storage time on germination and germination speed was determined at 30, 60, 90, 120, 150 and 180 days of storage at 4 °C and 45% relative humidity. The fungicide release effect was determined by inhibiting Fusarium oxysporum conidia germination. There were no negative effects of coatings on seed germination after storage. The treatment that provided both greater retention of the fungicidal agent and released it gradually, was 0.5% chitosan mixed with fungicide concentration. Chitosan coating seeds mixed with fungicide do not cause negative changes in seed germination or germination rate.

scholarly journals Micropropagation of Syngonanthus elegantulus

2013 ◽  
Vol 37 (1) ◽  
pp. 32-39 ◽  
Author(s):  
Rogério Gomes Pêgo ◽  
Patrícia Duarte de Oliveira Paiva ◽  
Renato Paiva
Keyword(s):  
Seed Germination ◽  
Salt Concentration ◽  
Callus Induction ◽  
Culture Medium ◽  
Nutrient Addition ◽  
Native Plant ◽  
Cut Flowers ◽  
Germination Speed ◽  
Endangered Status ◽  
Number Of Shoots

The species Syngonanthus elegantulus Ruhland is an important native plant used as cut flowers, but extractive exploration has caused the endangered status of this plant. Therefore, the objective of this study was to establish a protocol of the micropropagation of S. elegantulus. To this end, seed germination was tested in media containing different concentrations of WPM salts. For plantlet establishment, MS and WPM media were evaluated with 50 and 100% of the salt concentrations. Different the sucrose levels in the WPM medium were also evaluated. For multiplication, the plantlets were inoculated in WPM media with 0.0, 0.5, 1.0, 2.0 and 4.0 mg L-1 TDZ and 0.0, 0.5 and 1.0 mg L-1 NAA in all possible combinations. The pre-acclimatization effect was tested in the plantlets using the following substrates: sand, PlantmaxTM and vermiculite. The concentration of the medium did not influence the percentage of germination, but the germination speed index was inversely proportional to the nutrient addition to the culture medium. The best medium for plantlet establishment was WPM at the original salt concentration plus 17 g L-1 sucrose. The addition of 0.5 and 1.0 mg L-1 NAA is recommended for callus induction. The highest number of shoots was obtained in the presence of 1.0 mg L-1 TDZ or the combination of 1.0 mg L-1 TDZ with 0.5 mg L-1 NAA. S. elegantulus presented higher survival when acclimatized directly in sand.

scholarly journals Can tortoises facilitate the germination of plants with dry fruits? A simulation of the effects of Chelonoidis carbonarius (Testudines: Testudinidae) on the germination of Leucaena leucocephala (Fabaceae)

Rodriguésia ◽  
2016 ◽  
Vol 67 (3) ◽  
pp. 661-666
Author(s):  
João Fabrício Mota Rodrigues ◽  
Sâmia Paiva de Oliveira
Keyword(s):  
Seed Germination ◽  
Digestive Tract ◽  
Leucaena Leucocephala ◽  
Acidic Condition ◽  
Natural Environments ◽  
Germination Process ◽  
Germination Speed ◽  
Negative Effect ◽  
Acidic Conditions

Abstract Ingestion of seeds by vertebrates may influence seed germination and dispersion. However the mechanisms responsible by these effects and the importance of turtles in these interactions are still poorly understood. This study aims to evaluate how Chelonoidis carbonarius influences the germination process of Leucaena leucocephala using an experiment conducted at the Federal University of Ceará, Fortaleza-CE, Brazil, that simulates the passage of the seeds of this plant through the digestive tract of C. carbonarius: stomach acidic condition and seeds sown in feces. We demonstrated that sowing the seeds in feces of Chelonoidis carbonarius has a negative effect on the germination of Leucaena leucocephala, decreasing the germination speed index of the seeds, while the acidic conditions have a neutral one. This study is a first attempt to understand how turtles and tortoises may influence the seed germination, and the implications of these findings in natural environments deserve further investigations.

scholarly journals ALLELOPATHIC POTENTIAL OF Cyperus rotundus L. EXTRACTS ON GERMINATION AND COWPEA SEEDLING ESTABLISHMENT

Nativa ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 261
Author(s):  
João Alves Ferreira Pereira ◽  
Tatiana Maria da Silva ◽  
Andreza Raquel Barbosa de Farias ◽  
Alexandre Bosco de Oliveira
Keyword(s):  
Seed Germination ◽  
Vigna Unguiculata ◽  
Early Growth ◽  
Shoot Length ◽  
Cyperus Rotundus ◽  
Control Treatment ◽  
Root Weight ◽  
Allelopathic Potential ◽  
Germination Speed ◽  
Allelopathic Effects

POTENCIAL ALELOPÁTICO DE EXTRATOS DE Cyperus rotundus L. NA GERMINAÇÃO E ESTABELECIMENTO DE PLÂNTULAS DE FEIJÃO-CAUPI Este trabalho investigou os efeitos alelopáticos de extratos de Cyperus rotundus L. na germinação de sementes e crescimento inicial das plântulas de Vigna unguiculata L. Walp. Extratos alcoólicos nas concentrações 0; 1,5%; 3,0%; 4,5%; 6,0%; 7,5% e 9,0%, obtidos a partir da trituração de folhas de C. rotundus L. foram utilizados para umedecimento das folhas de papel toalha “germitest”. Os dados foram submetidos a análise de variância pelo F e as médias comparadas pelos testes de Tukey e Kruscal-Wallis, ambos a 5% de probabilidade. A primeira contagem de germinação, índice de velocidade de germinação, comprimento de raiz, comprimento da parte aérea e massa seca da raiz do feijão-caupi foram analisados de forma paramétrica, sendo constatado que apenas houve significância na variável primeira contagem e uma redução na germinação em relação ao tratamento controle em torno de 10%. Nas condições em que essa pesquisa foi realizada, os extratos alcoólicos de C. rotundus L. não afetam a germinação de sementes e crescimento inicial das plântulas de feijão-caupi.Palavras-chave: tiririca, alelopatia, interferência, plantas daninhas. ABSTRACT:This study aimed to investigate the allelopathic effects of Cyperus rotundus L. extracts on seed germination and early development of seedlings of Vigna unguiculata L. Walp. Alcoholic extracts at concentrations of 0, 1.5%, 3%, 4.5%, 6.0%, 7.5%, and 9.0% were obtained by crushing C. rotundus L. leaves used to moisten the “germitest” paper sheets. The data were subjected to analysis of variance and also both Tukey and Kruscal-Wallis tests were carried out at 5% for the data means. The first germination count, germination speed index, root length, shoot length, and dry root weight of cowpea were parametrically analyzed. The only variable with significance was first germination count. The germination reducted in relation to the control treatment around 10%. Thus, in the conditions used in this research, alcoholic extracts of C. rotundus L. did not affect either seed germination or early growth of cowpea seedlings.Keywords: nut grass, allelopathy, interference, weeds. DOI:

scholarly journals Response of Lupinus bracteolaris seeds to pre-germinative treatments and experimental conditions

2021 ◽  
Vol 12 (2) ◽  
pp. 51-66
Author(s):  
Luciana Pinto Paim ◽  
Eduarda Demari Avrella ◽  
Juliana Carolina Alves Horlle ◽  
Claudimar Sidnei Fior ◽  
Marília Lazarotto ◽  
...  
Keyword(s):  
Seed Germination ◽  
Substrate Temperature ◽  
Water Intake ◽  
White Light ◽  
Green Light ◽  
Experimental Conditions ◽  
Germination Time ◽  
Randomized Design ◽  
Germination Speed ◽  
Completely Randomized Design

Contextualization: Lupinus bracteolaris is a heliophite species that vegetates low lands, open slopes and sandstone hills. Knowledge gap: Despite the high rusticity and potential for covering poor soils, there is still no information to assist in the analysis of its seeds. Purpose: To determine pre-germinative treatments, substrate, temperature, luminosity and water intake in the vigor of Lupinus bracteolaris seeds. Methodology: Fruits were collected from 20 matrix plants, then the seeds were processed and submitted to the following tests: pre-germinative methods (six treatments at 25°C); substrates and temperatures (sand and paper at 20, 25 and 30°C); photoblast test (white light, diffuse-green light and continuous dark under 20°C) and the imbibition curve (control and scarification between sandpaper under 20°C). Evaluations: percentage of germination and formed seedlings, germination speed index, average germination time and seedling formation, using a completely randomized design. Results and conclusions: According to the analyzed variables, the results showed superiority for the pre-germinative treatment between sandpapers for 20 seconds. In addition, the substrate paper germibox and the temperature of 20°C were the most suitable during seed germination. The seeds of Lupinus bracteolaris were classified as neutral-photoblastic and without dormancy.

scholarly journals Genome-Wide Characterization and Expression Analysis of KH Family Genes Response to ABA and SA in Arabidopsis thaliana

2022 ◽  
Vol 23 (1) ◽  
pp. 511
Author(s):  
Yanjie Zhang ◽  
Yu Ma ◽  
Ruiqi Liu ◽  
Guanglin Li
Keyword(s):  
Arabidopsis Thaliana ◽  
Seed Germination ◽  
Nucleic Acid Binding ◽  
Phylogenetic Tree Analysis ◽  
Genome Wide ◽  
Binding Factor ◽  
Pathogenesis Related ◽  
Kh Domain ◽  
Family Based ◽  
Related Proteins

K-homologous (KH) family is a type of nucleic acid-binding protein containing the KH domain and has been found to affect splicing and transcriptional regulation. However, KH family genes haven’t been investigated in plant species systematically. In this study, we identified 30 genes that belonged to the KH family based on HMM of the KH domain in Arabidopsis thaliana. Phylogenetic tree analysis showed that the KH family is grouped into three subgroups. Synteny analysis showed that AtKH9 and AtKH29 have the conserved synteny relationship between A. thaliana and the other five species. The AtKH9 and AtKH29 were located in the cytoplasm and nucleus. The seed germination rates of the mutants atkh9 and atkh29 were higher than wild-type after abscisic acid (ABA) and salicylic acid (SA) treatments. In addition, the expression of ABA-related genes, such as ABRE-binding factor 2 (ABF2), ABRE-binding factor 4 (ABF4), and delta 1-pyrroline-5-carboxylate synthase (P5CS), and an SA-related gene pathogenesis-related proteins b (PR1b) were downregulated after ABA and SA treatments, respectively. These results suggested that atkh9 and atkh29 mutants inhibit the effect of ABA and SA on seed germination. In conclusion, our results provide valuable information for further exploration of the function of KH family genes and propose directions and ideas for the identification and characterization of KH family genes in other plants.

scholarly journals Transcriptional Programs Related to Phytochrome A Function in Arabidopsis Seed Germination

2013 ◽  
Vol 6 (4) ◽  
pp. 1261-1273 ◽  
Author(s):  
Silvia E. Ibarra ◽  
Gabriela Auge ◽  
Rodolfo A. Sánchez ◽  
Javier F. Botto
Keyword(s):  
Seed Germination ◽  
Phytochrome A ◽  
Arabidopsis Seed
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