Response of Poinsettia Growth and Development to Ratio of Radiant to Thermal Energy

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 508e-508
Author(s):  
Bin Liu ◽  
Royal D. Heins
Keyword(s):  
Plant Growth ◽  
Thermal Energy ◽  
Growth And Development ◽  
Model Simulation ◽  
Interactive Effect ◽  
Dry Weight ◽  
Plant Spacing ◽  
Plant Growth And Development ◽  
Daily Light Integral ◽  
Highly Correlated

A concept of ratio of radiant to thermal energy (RRT) has been developed to deal with the interactive effect of light and temperature on plant growth and development. This study further confirms that RRT is a useful parameter for plant growth, development, and quality control. Based on greenhouse experiments conducted with 27 treatment combinations of temperature, light, and plant spacing, a model for poinsettia plant growth and development was constructed using the computer program STELLA II. Results from the model simulation with different levels of daily light integral, temperature, and plant spacing showed that the RRT significantly affects leaf unfolding rate when RRT is lower than 0.025 mol/degree-day per plant. Plant dry weight is highly correlated with RRT; it increases linearly as RRT increases.

scholarly journals INFLUENCE OF TRICHODERMA ON THE GROWTH OF BEDDING PLANTS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1111e-1111
Author(s):  
GyeSoon Jeong ◽  
John M. Brown ◽  
Byoung Ryong Jeong
Keyword(s):  
Biological Control ◽  
Plant Growth ◽  
Growth And Development ◽  
Dry Weight ◽  
Peat Moss ◽  
Growth Enhancement ◽  
Plant Growth And Development ◽  
Bedding Plants ◽  
Soil Borne Pathogens ◽  
Bedding Plant

Trichoderm a spp. are currently being investigated for biological control of soil-borne pathogens and their potential to enhance plant growth and development. The influence of T. harzianum and T. hamatum on growth of 7 bedding plant species was Investigated. Trichoderm a formulated in peat moss and wheat bran, was mixed into germination and growing media at 1 × 106 cfu per gram of medium. Seeds were germinated in plugs and later grown in cellpacks containing a treated and non-treated medium until market stage. Plants were evaluated by measuring height, fresh and dry weight, and number and timing of flowering. Growth enhancement was found in marigold (14.8% dw), petunia (15.5% dw) and tomato (38.2% dw), however, no significant differences were seen in celosia, impatiens, salvi a and vinca. Results suggest that growth enhancement by Trichoderm a is species dependent and that Trichoderm a applied in the plug mix remains-effective through marketing stage.

scholarly journals Tissue-Specific RNA-Seq Analysis and Identification of Receptor-Like Proteins Related to Plant Growth in Capsicum annuum

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 972
Author(s):  
Won-Hee Kang ◽  
Boseul Park ◽  
Junesung Lee ◽  
Seon-In Yeom
Keyword(s):  
Plant Growth ◽  
Gene Family ◽  
Capsicum Annuum ◽  
Growth And Development ◽  
Function Analysis ◽  
Dry Weight ◽  
Defense Responses ◽  
Rna Seq ◽  
Plant Growth And Development ◽  
Biotic Stresses

Receptor-like proteins (RLPs) are a gene family of cell surface receptors that are involved in plant growth, development, and disease resistance. In a recent study, 438 pepper RLP genes were identified in the Capsicum annuum genome (CaRLPs) and determined to be present in response to multiple biotic stresses. To further understand the role of CaRLPs in plant growth and development, we analyzed expression patterns of all CaRLPs from various pepper tissues and developmental stages using RNA-seq. Ten CaRLP genes were selected for further analysis according to transcript levels with hierarchical clustering. The selected CaRLP genes displayed similarity of motifs within the same groups and structures typical of RLPs. To examine RLP function in growth and development, we performed loss-of-function analysis using a virus-induced gene silencing system. Three of the ten tested CaRLPs (CaRLP238, 253, and 360) in silenced plants exhibited phenotypic alteration with growth retardation compared to controls. All three gene-silenced peppers showed significant differences in root dry weight. Only CaRLP238 had significant differences in both root and shoot dry weight. Our results suggest that CaRLPs may play important roles in regulation of plant growth and development as well as function in defense responses to biotic stresses in the RLP gene family.

scholarly journals Efficacy of vermicompost and/or plant growth promoting bacteria on the plant growth and development in gladiolus

2019 ◽  
Vol 25 (2) ◽  
pp. 180-188
Author(s):  
Fazilet Parlakova Karagoz ◽  
Atilla Dursun ◽  
Nasibe Tekiner ◽  
Raziye Kul ◽  
Recep Kotan
Keyword(s):  
Plant Growth ◽  
Renewable Resources ◽  
Growth And Development ◽  
Root Zone ◽  
Growth Promotion ◽  
Plant Root ◽  
Dry Weight ◽  
Good Choice ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth And Development

The use of environmental and sustainable ornamental flower production practices with renewable resources has drawn worldwide interest. One of these renewable resources is vermicompost (earthworm castings). In recent years, increasing demand for improving environmental quality have focused on the importance of Plant Growth Promotion Bacteria (PGPBs) in agriculture. Vermicomposts also help microbial agents function effectively in soil. In this study, a total of six treatments [A: PGPB formulation, B: Not autoclaved vermicompost, C: Autoclaved vermicompost, D: Not autoclaved vermicompost+PGPBs, E: Autoclaved vermicompost+PGPBs, F: Control (untreated bacteria and vermicompost)] were tested for their effects on the plant growth and development parameters in gladiolus (Gladiolus grandiflorus L. ‘Red Beauty’) in greenhouse condition. Vermicompost was added to the related pots by dissolving in water. After the addition of vermicompost, PGPB formulation was given immediately to related pots. All the treatments were applied to soil once in three leaf stage, close to the plant root zone. Parameters in terms of yield and quality attributes of plant and corm were determined and analyzed. The treatment A increased in plant height of gladiolus of 24.55% rate. The earliest times to flowering was determined in E application (100.48 day), which also increased in corm diameter with rate of 17.41% and number of corms and cormels with rate of 151.83% according to F application. Results indicated that the treatment E promoted overall better performance as compared to other treatments diameter of flowers for number of leaves per plant, number of florets per spike, stem diameter, spike length, fresh and dry weight of flowers, the number and diameter of corm. Autoclaved vermicompost can be good choice in gladiolus cultivation but it should be enriched with PGPB.

Mechanisms of ethylene biosynthesis and response in plants

2015 ◽  
Vol 58 ◽  
pp. 61-70 ◽  
Author(s):  
Paul B. Larsen
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Ethylene Biosynthesis ◽  
Unsaturated Hydrocarbon ◽  
Flower Senescence ◽  
Detailed Knowledge ◽  
Plant Growth And Development ◽  
Step Process ◽  
Ethylene Response ◽  
Ethylene Signalling

Ethylene is the simplest unsaturated hydrocarbon, yet it has profound effects on plant growth and development, including many agriculturally important phenomena. Analysis of the mechanisms underlying ethylene biosynthesis and signalling have resulted in the elucidation of multistep mechanisms which at first glance appear simple, but in fact represent several levels of control to tightly regulate the level of production and response. Ethylene biosynthesis represents a two-step process that is regulated at both the transcriptional and post-translational levels, thus enabling plants to control the amount of ethylene produced with regard to promotion of responses such as climacteric flower senescence and fruit ripening. Ethylene production subsequently results in activation of the ethylene response, as ethylene accumulation will trigger the ethylene signalling pathway to activate ethylene-dependent transcription for promotion of the response and for resetting the pathway. A more detailed knowledge of the mechanisms underlying biosynthesis and the ethylene response will ultimately enable new approaches to be developed for control of the initiation and progression of ethylene-dependent developmental processes, many of which are of horticultural significance.

scholarly journals Brassinolide Enhances the Level of Brassinosteroids, Protein, Pigments, and Monosaccharides in Wolffia arrhiza Treated with Brassinazole

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1311
Author(s):  
Magdalena Chmur ◽  
Andrzej Bajguz
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Inhibitory Effect ◽  
Dependent Manner ◽  
Plant Growth And Development ◽  
Concentration Dependent Manner ◽  
Spectrophotometric Methods ◽  
Synthetic Inhibitor ◽  
Wolffia Arrhiza ◽  
First Time

Brassinolide (BL) represents brassinosteroids (BRs)—a group of phytohormones that are essential for plant growth and development. Brassinazole (Brz) is as a synthetic inhibitor of BRs’ biosynthesis. In the present study, the responses of Wolffia arrhiza to the treatment with BL, Brz, and the combination of BL with Brz were analyzed. The analysis of BRs and Brz was performed using LC-MS/MS. The photosynthetic pigments (chlorophylls, carotenes, and xanthophylls) levels were determined using HPLC, but protein and monosaccharides level using spectrophotometric methods. The obtained results indicated that BL and Brz influence W. arrhiza cultures in a concentration-dependent manner. The most stimulatory effects on the growth, level of BRs (BL, 24-epibrassinolide, 28-homobrassinolide, 28-norbrassinolide, catasterone, castasterone, 24-epicastasterone, typhasterol, and 6-deoxytyphasterol), and the content of pigments, protein, and monosaccharides, were observed in plants treated with 0.1 µM BL. Whereas the application of 1 µM and 10 µM Brz caused a significant decrease in duckweed weight and level of targeted compounds. Application of BL caused the mitigation of the Brz inhibitory effect and enhanced the BR level in duckweed treated with Brz. The level of BRs was reported for the first time in duckweed treated with BL and/or Brz.

scholarly journals Correction to: Non-specific phospholipase C (NPC): an emerging class of phospholipase C in plant growth and development

2021 ◽  
Author(s):  
Yuki Nakamura ◽  
Anh H. Ngo
Keyword(s):  
Open Access ◽  
Plant Growth ◽  
Phospholipase C ◽  
Growth And Development ◽  
Plant Growth And Development

The article Non-specific phospholipase C (NPC): an emerging class of phospholipase C in plant growth and development, was originally published Online First without Open Access.

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