相关实验视频

Updated: Jul 12, 2026

Scanning Electron Microscopy (SEM) Protocols for Problematic Plant, Oomycete, and Fungal Samples
10:57

Scanning Electron Microscopy (SEM) Protocols for Problematic Plant, Oomycete, and Fungal Samples

Published on: February 3, 2017

在selaginella的叶子中复杂的风化模式:在白植物中类似巨型植物的叶子

W H Wagner, J M Beitel, F S Wagner

    Science (New York, N.Y.)
    |November 19, 1982
    PubMed
    概括

    柳叶植物中的叶脉模式挑战了传统的定义. Selaginella schaffneri表现出复杂的,分支的花纹,与典型的微生物不同,表明了叶子复杂性的替代进化途径.

    更多相关视频

    Relating Stomatal Conductance to Leaf Functional Traits11:09

    Relating Stomatal Conductance to Leaf Functional Traits

    Published on: October 12, 2015

    Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area10:14

    Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

    Published on: October 25, 2024

    相关概念视频

    Seedless Vascular Plants03:24

    Seedless Vascular Plants

    Seedless Vascular Plants Were the First Tall Plants on Earth
    Light Acquisition02:16

    Light Acquisition

    In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
    Introduction to Seed Plants03:40

    Introduction to Seed Plants

    Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
    Basic Plant Anatomy: Roots, Stems, and Leaves02:27

    Basic Plant Anatomy: Roots, Stems, and Leaves

    The primary organs of vascular plants are roots, stems, and leaves, but these structures can be highly variable, adapted for the specific needs and environment of different plant species.
    Non-vascular Seedless Plants02:26

    Non-vascular Seedless Plants

    The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
    Epiphytes, Parasites, and Carnivores02:40

    Epiphytes, Parasites, and Carnivores

    Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...