Leaf Structure & Evolution - Digital Atlas of Ancient Life
2020年6月2日 · Two basic types of leaves occur in vascular plants, microphylls (Greek mikros + phyllon = small leaf) and megaphylls (Greek megas + phyllon = large leaf). These terms are used to distinguish leaf types that differ in their evolutionary origins and, often, their structural attributes.
Plant - Evolution, Paleobotany, Photosynthesis | Britannica
2025年1月16日 · Botanists now believe that plants evolved from the algae; the development of the plant kingdom may have resulted from evolutionary changes that occurred when photosynthetic multicellular organisms invaded the continents.
The origin and early evolution of vascular plant shoots and leaves
2017年12月18日 · In this review, we aim to give an overview of the stages in vascular plant shoot and leaf evolution evident in the fossil record, explain how developmental and genetic findings in bryophytes and non-seed vascular plants illuminate these steps and identify future research avenues that will tell us more about how vascular plant shoots and leaves ...
The origin and early evolution of plants - ScienceDirect
2023年3月1日 · The cyanobacterial symbiont evolved to become the lineage of plastids in extant plants (e.g., chloroplasts), thus enabling the evolution of the first photosynthetic eukaryotes. Based on phylogenomic evidence, archaeplastid plastids emerged from deep branching cyanobacteria, with the closest living relative identified as Gloeomargarita ...
Leaf development and evolution - ScienceDirect
2019年1月1日 · Leaves are the main photosynthetic organs in plants and exhibit a staggering diversity of forms. This variation provides an excellent model for understanding how biological shapes are generated and how they evolved (Bar & Ori, 2015; Rebeiz & Tsiantis, 2017). Much of the diversity in leaf shape reflects variation of leaf margins (Fig. 1 A ...
Megaphylls, microphylls and the evolution of leaf development
2009年1月1日 · Leaf evolution was the earliest major plant biology question to be addressed using a comprehensive evo-devo approach. Work on leaf evolution integrated all the data types available (morphology, anatomy, development, phylogenetic hypotheses and the fossil record) to produce consistent theories.
Leaf Evolution: Gases, Genes and Geochemistry - Oxford …
2005年6月19日 · Plants evolved leaves on at least two independent occasions and the legacy of these historic evolutionary events is represented in extant floras by microphylls in lycophytes (clubmosses, spikemosses and quillworts) and megaphylls in euphyllophytes (ferns, gymnosperms and angiosperms).
Evolutionary and Developmental Origins of Leaves
2009年11月10日 · Leaves are the primary photosynthetic organs for most plants and critically important for our oxygen-rich environment. What do we do we know about the events that contributed to their evolution ∼ 400 million years ago ?
Evolution of leaf-form in land plants linked to atmospheric CO
2001年3月15日 · The early axial-type plants showed a gradual shift, developing much-branched determinate lateral systems (‘proto-leaves’) and then fully ‘webbed’ (that is, laminate) planate leaves with ...
The evolution, morphology, and development of fern leaves
2013年9月3日 · Here we discuss the theories of leaf evolution in ferns, morphology, and diversity of fern leaves, and experimental results of fern leaf development. We summarize what is known about the molecular genetics of fern leaf development and what future studies might tell us about the evolution of fern leaf development.