相关概念视频
03:02Primary and Secondary Growth in Roots and Shoots
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
02:26Responses to Gravity and Touch
Gravitropism: Plant Responses to Gravity
02:34Water and Mineral Acquisition
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
02:36Meristems and Plant Growth
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
02:12Short-distance Transport of Resources
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
02:41Responses to Drought and Flooding
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
您也可能阅读
相关文章
通过共同作者、期刊和引用图与本文相关的文章。
排序
Same author
POLYRADICULONEUROPATHY (GUILLAIN-BARR'E SYNDROME) WITH IMMUNOLOGIC FEATURES SUGGESTIVE OF NEURAL HYPERSENSITIVITY AND WITH HYPONATREMIA: REPORT OF A CASE. RES REP MR005.09-1601.3.18.
Report (U.S. Naval Medical Research Laboratory)·2014
Same author
LABORATORY INFECTION WITH LOUPING-ILL VIRUS; A CASE STUDY. RES REP MR005.09-1201.2.13.
Report (U.S. Naval Medical Research Laboratory)·2014
Same author
Studies on Plasmodium gallinaceum Brumpt; the incidence and course of the infection in young chicks following the subcutaneous inoculation of pooled sporozoites.
American journal of hygiene·2010
概括
No abstract available in PubMed .
