| 词汇 | meristem |
| 释义 | meristem noun[ C ] biology specializeduk /ˈmeristem/ us /ˈmeristem/ a type of tissue with cells that divide, found in the parts of plants where growth happens分生组织 Parts of plants axil bark bilobed blade bulb caning cascara sagrada corolla endodermis inflorescence knot pistil rosella seed coat seed pod sessile shaw sting taproot tubule Examples of meristemmeristem Seedling dynamics of a tropical tree: impacts of herbivory and meristem damage. Moreover, studies describing effects of herbivores on population dynamics and community structure refer to only seed predation, seedling meristem herbivory or grazing. It could not be determined, however, what degree of water loss had occurred in hypocotyl cells compared with those of meristems. Each spectrum was obtained for a globoid from a different spongy ground meristem cell. The data suggest that the embryo moisture content may control the extent of mitotic activity in the meristems of maturing seed. The rot affects the meristem in young palms more frequently than in adult palms. The lack of axillary meristems on the main stem make palms inherently susceptible to die standing from insect attacks. For instance, asynchronous differentiation of rachis branch meristem from the primary inflorescence meristems is acropetal. In contrast, asynchronous rachis branch development (acropetal differentiation of rachis branch meristems and/or spikelet meristems) progresses basipetally. Asynchronous differentiation of spikelet meristems from a single rachis branch meristem is acropetal. This resurrection capacity is not restricted to the main meristems of these plants. We reduced variability by eliminating from the study cells of the two protoderm layers, the provascular regions and the palisade ground meristem. High mortality during these periods was related to flowering of adult plants and apical meristem damage. In many cases, the rot stops spreading before it reaches the meristem. The majority of regrowth occurred during the same 6-mo period as the loss of the apical meristem. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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