被子植物的叶，叶脉维管束发达，双子叶植物中栎树（Quercus spp．）、苹果（Malus pumila）等，单子叶植物中禾本科（Gramineae）的维管束鞘，是由相当大形的薄壁或厚壁的薄壁细胞构成，一般具叶绿体，不仅能输导，也可进行暂时性光合作用，当叶绿体消失后就不再具有这些功能；因为是多层细胞构成的机械组织，所以能起到一定支撑作用。 维管束鞘可以质贮藏。 在多数情况下，从叶子横切面来看， 维管束鞘 向上下两表皮延伸，成为 维管束鞘 伸展 …

2011年4月1日 · Our study provides new evidence that variations in the distribution of hydraulic resistance within the leaf and plant are central to understanding dynamic stomatal responses to water status and their ecological correlates and that BSEs play several key roles in the functional ecology of heterobaric leaves.

2018年12月6日 · In heterobaric leaves, bundle sheath extensions (BSEs) increase photosynthetic performance (light-saturated rates of photosynthesis, Amax) and water transport capacity (leaf hydraulic conductance, Kleaf). However, it is not clear how BSEs affect these and other leaf developmental and physiological parameters in response to environmental conditions.

2021年1月7日 · Based on plasmodesmatal connections between S-type cells and mestome sheath (parenchymatous cell layer below bundle sheath), S-type cells likely transfer assimilates toward the phloem. Here, we used single-cell RNA sequencing to investigate BS differentiation in C 4 maize (Zea mays L.) plants.

2023年12月6日 · Draw or insert a picture of an Elodea leaf viewed with your microscope. This will be a top down picture and not a cross section. Clearly indicate the epidermal, bundle sheath (axial cells) and sieve tube cells.

2010年1月1日 · Hydrilla, Egeria, and Elodea leaves lacks stomata and the lamina is only two photosynthetic cells thick, and thus lacks the chlorenchymatous mesophyll and bundle sheath cells of terrestrial C 4 species (Bowes et al., 2002).

1998年5月15日 · Bundle sheath cells form a sheath around the entire vascular tissue in Arabidopsis leaves and constitute a distinct leaf cell type, as defined by their elongate morphology, their position adjacent to the vein and by differences in their chloroplast development compared to mesophyll cells.

The bundle sheath would be more prominent in cells that are in taking more sunlight because they need to keep the water in

Draw or insert a picture of an Elodea leaf viewed with your microscope. This will be a top down picture and not a cross section. Clearly indicate the epidermal, bundle sheath (axial cells) and sieve tube cells.

What is elodea missing? Cutin, bundle sheath, palisades layer, spongy layer, guard cells, and stomata. Access easy-to-understand explanations and practical examples on key biology topics, from cells to ecosystems. Learn at your own pace with bite-sized, verified content. 75. Fetal membranes overview. What are the pears missing?