scholarly journals Red Light-inhibited Mesocotyl Elongation in Maize Seedlings

1978 ◽  
Vol 61 (4) ◽  
pp. 534-537 ◽  
Author(s):  
Larry N. Vanderhoef ◽  
Winslow R. Briggs
Keyword(s):  
Red Light ◽  
Maize Seedlings ◽  
Mesocotyl Elongation

scholarly journals Red Light-inhibited Mesocotyl Elongation in Maize Seedlings

1979 ◽  
Vol 63 (6) ◽  
pp. 1062-1067 ◽  
Author(s):  
Larry N. Vanderhoef ◽  
Peter H. Quail ◽  
Winslow R. Briggs
Keyword(s):  
Red Light ◽  
Maize Seedlings ◽  
Mesocotyl Elongation

scholarly journals Regulation of the expression of NADP-malic enzyme by UV-B, red and far-red light in maize seedlings

1999 ◽  
Vol 32 (10) ◽  
pp. 1187-1193 ◽  
Author(s):  
P. Casati ◽  
M.F. Drincovich ◽  
G.E. Edwards ◽  
C.S. Andreo
Keyword(s):  
Malic Enzyme ◽  
Red Light ◽  
Maize Seedlings

scholarly journals Network Analysis of Different Exogenous Hormones on the Regulation of Deep Sowing Tolerance in Maize Seedlings

2021 ◽  
Vol 12 ◽  
Author(s):  
Fenqi Chen ◽  
Xiangzhuo Ji ◽  
Mingxing Bai ◽  
Zelong Zhuang ◽  
Yunling Peng
Keyword(s):  
Inbred Line ◽  
Expression Profiles ◽  
Lignin Biosynthesis ◽  
Maize Seedlings ◽  
Deep Soil ◽  
Exogenous Hormones ◽  
Mesocotyl Elongation ◽  
Gene Modules ◽  
Transcriptome Expression ◽  
Planting Method

The planting method of deep sowing can make the seeds make full use of water in deep soil, which is considered to be an effective way to respond to drought stress. However, deep sowing will affect the growth and development of maize (Zea mays L.) at seedling stage. To better understand the response of maize to deep sowing stress and the mechanism of exogenous hormones [Gibberellin (GA3), Brassinolide (BR), Strigolactone (SL)] alleviates the damaging effects of deep-sowing stress, the physiological and transcriptome expression profiles of seedlings of deep sowing sensitive inbred line Zi330 and the deep-tolerant inbred line Qi319 were compared under deep sowing stress and the conditions of exogenous hormones alleviates stress. The results showed that mesocotyl elongated significantly after both deep sowing stress and application of exogenous hormones, and its elongation was mainly through elongation and expansion of cell volume. Hormone assays revealed no significant changes in zeatin (ZT) content of the mesocotyl after deep sowing and exogenous hormone application. The endogenous GA3 and auxin (IAA) contents in the mesocotyl of the two inbred lines increased significantly after the addition of exogenous GA3, BR, and SL under deep sowing stress compared to deep sowing stress, while BR and SL decreased significantly. Transcriptome analysis showed that the deep seeding stress was alleviated by GA3, BR, and SLs, the differentially expressed genes (DEGs) mainly included cellulose synthase, expansin and glucanase, oxidase, lignin biosynthesis genes and so on. We also found that protein phosphatase 2C and GA receptor GID1 enhanced the ability of resist deep seeding stress in maize by participating in the abscisic acid (ABA) and the GA signaling pathway, respectively. In addition, we identified two gene modules that were significantly related to mesocotyl elongation, and identified some hub genes that were significantly related to mesocotyl elongation by WGCNA analysis. These genes were mainly involved in transcription regulation, hydrolase activity, protein binding and plasma membrane. Our results from this study may provide theoretical basis for determining the maize deep seeding tolerance and the mechanism by which exogenous hormones regulates deep seeding tolerance.

Maize AUXIN-BINDING PROTEIN 1 and AUXIN-BINDING PROTEIN 4 impact on leaf growth, elongation, and seedling responsiveness to auxin and light

Botany ◽  
2012 ◽  
Vol 90 (10) ◽  
pp. 990-1006 ◽  
Author(s):  
Dejana Jurišić-Knežev ◽  
Mária Čudejková ◽  
David Zalabák ◽  
Marta Hlobilová ◽  
Jakub Rolčík ◽  
...  
Keyword(s):  
Binding Protein ◽  
Leaf Growth ◽  
Red Light ◽  
Maize Seedlings ◽  
Exogenous Auxin ◽  
Auxin Binding ◽  
Auxin Binding Protein ◽  
Auxin Binding Proteins ◽  
The Relationship

In maize, at least five auxin-binding proteins (ABPs) have been identified, yet their functions remain unclear. The present study reports the use of maize abp1, abp4, and abp1abp4 mutants to investigate the role of ABPs during maize growth and development. Single and double abp mutant plants grown in a greenhouse differ from the wild type (WT) in their leaf declination and leaf blade growth. The effect of the dark (D), blue light (BL), red light (RL), and exogenous auxin on the development of mutant seedlings was also studied. Relative to WT, etiolated mutant seedlings were shorter and showed a reduced responsiveness to exogenous auxin. In BL or RL, the responsiveness of maize seedlings to auxin was distinctly less than in D. The reducing effect of light on seedling responsiveness to auxin is mediated at least by phytochromes. The suppression of ABP1 and (or) ABP4 led to a distinct accumulation of free indole-3-acetic acid (IAA) in etiolated and light-grown seedling organs. We concluded that ABP1 and ABP4 participate in the growth of maize seedlings, mediate seedling responses to auxin, and interact with light signaling pathway(s). We also deduce a functional interaction between ABP1 and ABP4, which is that the relationship between them is light-, organ- and response-dependent.

scholarly journals Assay system for mesocotyl elongation and hydrotropism of maize primary root in response to low moisture gradient

BioTechniques ◽  
2021 ◽  
Vol 71 (4) ◽  
pp. 516-527
Author(s):  
Mery Nair Sáenz-Rodríguez ◽  
Gladys Iliana Cassab López
Keyword(s):  
Primary Root ◽  
Test System ◽  
Moisture Gradient ◽  
Maize Seedlings ◽  
Growth Environment ◽  
Mesocotyl Elongation ◽  
Maize Genetic ◽  
Emergence Phase ◽  
Gradient Condition ◽  
Potential Use

We designed and validated a test system that simulates a growth environment for  Zea mays L. maize seedlings under conditions of low moisture gradient in darkness. This system allowed us to simultaneously measure mesocotyl elongation and the primary root hydrotropic response in seedlings before the emergence phase in a collection of maize hybrids. We found great variation in these two traits with statistically significant reduction of their elongations under the low moisture gradient condition that indicate the richness of maize genetic diversity. Hence, the objective of designing a new test system that evaluates the association between these underground traits with the potential use to measure other traits in maize seedlings related to early vigor was achieved.

Coronatine inhibits mesocotyl elongation by promoting ethylene production in etiolated maize seedlings

2019 ◽  
Vol 90 (1) ◽  
pp. 51-61 ◽  
Author(s):  
Yingru Liu ◽  
Yuyi Zhou ◽  
Guanmin Huang ◽  
Nana Zhu ◽  
Zhaohu Li ◽  
...  
Keyword(s):  
Ethylene Production ◽  
Maize Seedlings ◽  
Mesocotyl Elongation

Influence of red light on the expression of genes on stomatal formation in maize seedlings

2020 ◽  
Vol 100 (3) ◽  
pp. 296-303
Author(s):  
Tie Dong Liu ◽  
Xi Wen Zhang ◽  
Yong Xu
Keyword(s):  
Blue Light ◽  
Stomatal Density ◽  
Red Light ◽  
Net Photosynthesis ◽  
Stomatal Development ◽  
Intercellular Signaling ◽  
Stomatal Index ◽  
Maize Seedlings ◽  
Expression Levels ◽  
Expression Of Genes

Red light significantly affects the expression of plant photoreceptor genes and influences stomatal development through crosstalk of the constitutive photomorphogenic 1–cryptochrome–phytochrome signaling pathway. When blue light was replaced with red light, the expression levels of ZmCry1, ZmPhyB1, ZmEPF2, and ZmEPFL9 were enhanced, whereas that of ZmCOP1 was restricted. Moreover, the expression levels of ZmSPCH and ZmMUTE were also enhanced, but they were generally lower than those under white light. Consequently, stomatal formation, which was determined by net photosynthesis, stomatal conductance, intercellular CO2 concentration, and transpiration rate, was inhibited through decreased stomatal index and stomatal density. We conclude that red light positively regulates EPFL9 in the intercellular signaling but reduces the positive regulation of blue light on COP1 and epidermal patterning factor 2 in the intracellular and intercellular signaling; therefore, though red light promotes the gene’s function on stomatal development of seedling maize, blue light maybe dominant to red light in seedling stage.

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