Growth-, Water-, and Nutrient-Related Plasticity in Hybrid Mahogany Leaf Development Under Contrasting Light Regimes

2006 ◽  
pp. 146-168
Author(s):  
Ernesto Medina ◽  
Hsiang-Hua Wang ◽  
Ariel E. Lugo ◽  
Nathaniel Popper
Keyword(s):  
Leaf Development ◽  
Light Regimes

scholarly journals The utilization of carbohydrates in aspen roots following partial or complete top removal

1983 ◽  
Vol 13 (4) ◽  
pp. 685-689 ◽  
Author(s):  
R. D. FitzGerald ◽  
J. Hoddinott
Keyword(s):  
Leaf Development ◽  
Shoot Growth ◽  
Net Photosynthesis ◽  
Light Regimes ◽  
Carbohydrate Concentration ◽  
Shoot Production ◽  
Quantum Flux ◽  
Dormant Season ◽  
Carbohydrate Levels ◽  
Normal Light

The decline in carbohydrates in roots of aspen (Populustremuloides Michx.) as a consequence of shoot production and the contribution of new shoots to root carbohydrate levels was investigated as part of a study of the factors controlling aspen regrowth following top removal. The level of non structural carbohydrates in the roots of young aspen shoots which had been clipped during the growing season was estimated at the commencement of the dormant season. Segments of the roots were then placed in growth cabinets and kept either in darkness or in one of two light regimes having equal quantum flux densities, but with quality akin to either normal sunlight or shade. Shoot growth in darkness was greater from roots taken from plots where clipping had been conducted in midseason rather than later in the season, suggesting that some carbohydrate replenishment had taken place in those plots. Carbohydrate concentration in roots placed in the three light regimes declined to approximately the same extent over the 8 weeks of the experiment, but total weight of shoots was greater in light than in darkness, which suggests that newly synthesized carbohydrates were retained in the tops for growth. While shoots in normal and shade quality light were not phenologically different, shoots in normal light had greater leaf development than shoots in shade light and were heavier, presumably as a consequence of the greater leaf development leading to a greater net photosynthesis.

scholarly journals Transcriptome Analysis of Ginkgo biloba L. Leaves across Late Developmental Stages Based on RNA-Seq and Co-Expression Network

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 315
Author(s):  
Hailin Liu ◽  
Xin Han ◽  
Jue Ruan ◽  
Lian Xu ◽  
Bing He
Keyword(s):  
Ginkgo Biloba ◽  
Leaf Development ◽  
Developmental Stages ◽  
Leaf Growth ◽  
Rna Seq ◽  
Final Size ◽  
Dioecious Species ◽  
Related Factors ◽  
New Genes ◽  
Gene Modules

The final size of plant leaves is strictly controlled by environmental and genetic factors, which coordinate cell expansion and cell cycle activity in space and time; however, the regulatory mechanisms of leaf growth are still poorly understood. Ginkgo biloba is a dioecious species native to China with medicinally and phylogenetically important characteristics, and its fan-shaped leaves are unique in gymnosperms, while the mechanism of G. biloba leaf development remains unclear. In this study we studied the transcriptome of G. biloba leaves at three developmental stages using high-throughput RNA-seq technology. Approximately 4167 differentially expressed genes (DEGs) were obtained, and a total of 12,137 genes were structure optimized together with 732 new genes identified. More than 50 growth-related factors and gene modules were identified based on DEG and Weighted Gene Co-expression Network Analysis. These results could remarkably expand the existing transcriptome resources of G. biloba, and provide references for subsequent analysis of ginkgo leaf development.

scholarly journals Genome-wide analysis of changes in miRNA and target gene expression reveals key roles in heterosis for Chinese cabbage biomass

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Peirong Li ◽  
Tongbing Su ◽  
Deshuang Zhang ◽  
Weihong Wang ◽  
Xiaoyun Xin ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Leaf Development ◽  
Target Genes ◽  
Expression Patterns ◽  
Seedling Stage ◽  
Differentially Expressed ◽  
Small Rna Sequencing ◽  
Leaf Morphogenesis ◽  
Expression Levels ◽  
Parental Lines

AbstractHeterosis is a complex phenomenon in which hybrids show better phenotypic characteristics than their parents do. Chinese cabbage (Brassica rapa L. spp. pekinensis) is a popular leafy crop species, hybrids of which are widely used in commercial production; however, the molecular basis of heterosis for biomass of Chinese cabbage is poorly understood. We characterized heterosis in a Chinese cabbage F1 hybrid cultivar and its parental lines from the seedling stage to the heading stage; marked heterosis of leaf weight and biomass yield were observed. Small RNA sequencing revealed 63 and 50 differentially expressed microRNAs (DEMs) at the seedling and early-heading stages, respectively. The expression levels of the majority of miRNA clusters in the F1 hybrid were lower than the mid-parent values (MPVs). Using degradome sequencing, we identified 1,819 miRNA target genes. Gene ontology (GO) analyses demonstrated that the target genes of the MPV-DEMs and low parental expression level dominance (ELD) miRNAs were significantly enriched in leaf morphogenesis, leaf development, and leaf shaping. Transcriptome analysis revealed that the expression levels of photosynthesis and chlorophyll synthesis-related MPV-DEGs (differentially expressed genes) were significantly different in the F1 hybrid compared to the parental lines, resulting in increased photosynthesis capacity and chlorophyll content in the former. Furthermore, expression of genes known to regulate leaf development was also observed at the seedling stage. Arabidopsis plants overexpressing BrGRF4.2 and bra-miR396 presented increased and decreased leaf sizes, respectively. These results provide new insight into the regulation of target genes and miRNA expression patterns in leaf size and heterosis for biomass of B. rapa.

scholarly journals Quantitative Trait Loci Affecting Flag Leaf Development in Rice (Oryza sativa L.)

2003 ◽  
Vol 53 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Sohei Kobayashi ◽  
Yoshimichi Fukuta ◽  
Satoshi Morita ◽  
Tadashi Sato ◽  
Mitsuru Osaki ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Leaf Development ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
Trait Loci
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