scholarly journals Purification of Alginate Oligosaccharides with Root Growth-promoting Activity toward Lettuce

2000 ◽  
Vol 64 (5) ◽  
pp. 1067-1070 ◽  
Author(s):  
Ken-ichi IWASAKI ◽  
Yasuhito MATSUBARA
Keyword(s):  
Root Growth ◽  
Alginate Oligosaccharides ◽  
Growth Promoting

scholarly journals The Arabidopsis Root Tip (Phospho)Proteomes at Growth-Promoting versus Growth-Repressing Conditions Reveal Novel Root Growth Regulators

Cells ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1665
Author(s):  
Natalia Nikonorova ◽  
Evan Murphy ◽  
Cassio Flavio Fonseca de Lima ◽  
Shanshuo Zhu ◽  
Brigitte van de Cotte ◽  
...  
Keyword(s):  
Cell Wall ◽  
Root Growth ◽  
Growth Regulators ◽  
Growth Regulation ◽  
Phosphorylation Site ◽  
Primary Root ◽  
Root Tip ◽  
Arabidopsis Root ◽  
Growth Promoting ◽  
The Impact

Auxin plays a dual role in growth regulation and, depending on the tissue and concentration of the hormone, it can either promote or inhibit division and expansion processes in plants. Recent studies have revealed that, beyond transcriptional reprogramming, alternative auxin-controlled mechanisms regulate root growth. Here, we explored the impact of different concentrations of the synthetic auxin NAA that establish growth-promoting and -repressing conditions on the root tip proteome and phosphoproteome, generating a unique resource. From the phosphoproteome data, we pinpointed (novel) growth regulators, such as the RALF34-THE1 module. Our results, together with previously published studies, suggest that auxin, H+-ATPases, cell wall modifications and cell wall sensing receptor-like kinases are tightly embedded in a pathway regulating cell elongation. Furthermore, our study assigned a novel role to MKK2 as a regulator of primary root growth and a (potential) regulator of auxin biosynthesis and signalling, and suggests the importance of the MKK2 Thr31 phosphorylation site for growth regulation in the Arabidopsis root tip.

Nitric Oxide and Plant Growth Promoting Rhizobacteria: Common Features Influencing Root Growth and Development

2007 ◽  
pp. 1-33 ◽  
Author(s):  
Celeste Molina‐Favero ◽  
Cecilia Mónica Creus ◽  
María Luciana Lanteri ◽  
Natalia Correa‐Aragunde ◽  
María Cristina Lombardo ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Plant Growth ◽  
Root Growth ◽  
Growth And Development ◽  
Plant Growth Promoting Rhizobacteria ◽  
Common Features ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Root Growth And Development

A Root Growth-promoting Factor, Capillarol, fromArtemisia capillarisThunb

1986 ◽  
Vol 50 (12) ◽  
pp. 3083-3086
Author(s):  
Junichi Ueda ◽  
Takao Yokota ◽  
Nobutaka Takahashi ◽  
Michio Yoshida ◽  
Jiro Kato
Keyword(s):  
Root Growth ◽  
Growth Promoting

scholarly journals Humate-Based Biostimulants Do Not Consistently Increase Growth of Container-Grown Turkish Hazelnut

1997 ◽  
Vol 15 (4) ◽  
pp. 197-199
Author(s):  
Matt Kelting ◽  
J. Roger Harris ◽  
Jody Fanelli ◽  
Bonnie Appleton ◽  
Alex Niemiera
Keyword(s):  
Root Growth ◽  
Root Length ◽  
Plant Root ◽  
Fertilizer Application ◽  
Organic Substrate ◽  
Fertilizer Rate ◽  
Application Rates ◽  
Lower Root ◽  
Wettable Powder ◽  
Growth Promoting

Abstract Humate-based products have been aggressively marketed to nursery producers as biostimulants which increase plant growth. Reports of their effect on container-grown trees in organic substrate are few. We tested four distinct types of biostimulants on top and root growth of Turkish hazelnut (Corylus colurna L.), grown in containers with pine-bark substrate. Treatments included: 1) an untreated control; 2) humate, applied as a dry topdress; 3) humate, formulated as a wettable powder and applied as a substrate drench; 4) humate, applied as a pre-plant root soak; 5) humate, to which various purported root growth-promoting additives had been added, also applied as a root soak. All treatments were tested within low, medium, and high fertilizer application regimes. No treatment increased top growth compared to untreated trees, and the root-soak treatments had the lowest top growth. At high and low fertilizer application rates, root length was similar for all treatments except for root-soak treatments, which had lower root lengths. At the medium fertilizer rate, root length was greatest for trees treated with granular humate applied as a dry topdressing and lowest for trees treated with root soaks.

scholarly journals Alginate Lyases: Sources, Mechanism of Activity and Potencial Application

2013 ◽  
Vol 8 (3) ◽  
pp. 105 ◽  
Author(s):  
Subaryono Subaryono ◽  
Rosmawaty Peranginangin ◽  
Maggy Thenawidjaja Suhartono ◽  
Fransiska Rungkat Zakaria
Keyword(s):  
Rheological Properties ◽  
Structure Analysis ◽  
Biological Activities ◽  
Alginate Lyase ◽  
Present Review ◽  
Biological Engineering ◽  
Alginate Oligosaccharides ◽  
Potential Applications ◽  
Growth Promoting ◽  
Alginate Lyases

Alginate lyases are group of enzymes which catalyze depolymerization of alginate into oligosaccharides. Alginate lyase have been widely used in many applications such as in production of bioactive oligosaccharides, control of polysaccharide rheological properties, and polysaccharide structure analysis. The products of alginate lyase, polysaccharide structure analysis, alginate oligosaccharides (AOS) have many biological activities including act as prebiotics, immune modulator, anticoagulation, antioxidant, anticancer, growth promoting activities, promote production of antibiotics and ethanol. In relation to the importance of alginate lyases, their potential aplications and prospect in development of new bioactive products, we present review of the enzymes, sources, mechanism of activity and potential applications. This paper also discussed some new biological engineering in alginate lyase production.

scholarly journals Plantibacter flavus, Curtobacterium herbarum, Paenibacillus taichungensis, and Rhizobium selenitireducens Endophytes Provide Host-Specific Growth Promotion of Arabidopsis thaliana, Basil, Lettuce, and Bok Choy Plants

2019 ◽  
Vol 85 (19) ◽  
Author(s):  
Evan Mayer ◽  
Patricia Dörr de Quadros ◽  
Roberta Fulthorpe
Keyword(s):  
Arabidopsis Thaliana ◽  
Plant Growth ◽  
Root Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Plant Growth Promoting Bacteria ◽  
Bacterial Endophytes ◽  
Content Type ◽  
Plant Growth Promoting ◽  
Growth Promoting

ABSTRACT A collection of bacterial endophytes isolated from stem tissues of plants growing in soils highly contaminated with petroleum hydrocarbons were screened for plant growth-promoting capabilities. Twenty-seven endophytic isolates significantly improved the growth of Arabidopsis thaliana plants in comparison to that of uninoculated control plants. The five most beneficial isolates, one strain each of Curtobacterium herbarum, Paenibacillus taichungensis, and Rhizobium selenitireducens and two strains of Plantibacter flavus were further examined for growth promotion in Arabidopsis, lettuce, basil, and bok choy plants. Host-specific plant growth promotion was observed when plants were inoculated with the five bacterial strains. P. flavus strain M251 increased the total biomass and total root length of Arabidopsis plants by 4.7 and 5.8 times, respectively, over that of control plants and improved lettuce and basil root growth, while P. flavus strain M259 promoted Arabidopsis shoot and root growth, lettuce and basil root growth, and bok choy shoot growth. A genome comparison between P. flavus strains M251 and M259 showed that both genomes contain up to 70 actinobacterial putative plant-associated genes and genes involved in known plant-beneficial pathways, such as those for auxin and cytokinin biosynthesis and 1-aminocyclopropane-1-carboxylate deaminase production. This study provides evidence of direct plant growth promotion by Plantibacter flavus. IMPORTANCE The discovery of new plant growth-promoting bacteria is necessary for the continued development of biofertilizers, which are environmentally friendly and cost-efficient alternatives to conventional chemical fertilizers. Biofertilizer effects on plant growth can be inconsistent due to the complexity of plant-microbe interactions, as the same bacteria can be beneficial to the growth of some plant species and neutral or detrimental to others. We examined a set of bacterial endophytes isolated from plants growing in a unique petroleum-contaminated environment to discover plant growth-promoting bacteria. We show that strains of Plantibacter flavus exhibit strain-specific plant growth-promoting effects on four different plant species.

scholarly journals Growth-Promoting Effect of Alginate Oligosaccharides on a Unicellular Marine Microalga,Nannochloropsis oculata

2009 ◽  
Vol 73 (2) ◽  
pp. 450-453 ◽  
Author(s):  
Takeshi YOKOSE ◽  
Toru NISHIKAWA ◽  
Yoshiko YAMAMOTO ◽  
Yasuhiro YAMASAKI ◽  
Kenichi YAMAGUCHI ◽  
...  
Keyword(s):  
Nannochloropsis Oculata ◽  
Promoting Effect ◽  
Marine Microalga ◽  
Alginate Oligosaccharides ◽  
Growth Promoting
Sign in / Sign up

Export Citation Format

Share Document