| 单词 | pericarp |
| 释义 | pericarp noun[Cusually singular] biologyspecializeduk/ˈper.ɪ.kɑːp/us/ˈper.ɪ.kɑːrp/thelayerthatdevelopsfrom theovarywallaround theseedof aplantafter it isfertilizedandformstheskinandfleshof thefruit 果皮（植物种子授精后沿其卵巢壁生成的一层，形成果子的皮和肉）Parts of plants
Examplesofpericarppericarp Thepericarpappears to form the main natural barrier to desiccation under both natural and artificial conditions of seed storage. From theCambridge English Corpus The seeds are surrounded by thepericarpand sepals and do not become dormant. From theCambridge English Corpus That is obvious, considering the high overlap index of their diet in fruit sizes and vegetable forms eaten (flowers, seeds, pericarps, entire fruits). From theCambridge English Corpus There is no doubt that the presence of a fleshypericarpis inhibitory to seed germination in some plants. From theCambridge English Corpus One possible factor is the integrity of thepericarp, which acts as a screen against pathogenic infection and also plays an important role in osmoregulation. From theCambridge English Corpus However, if the autumn-winter temperature is low and the soil is damp, thepericarpshould afford efficient protection against water loss. From theCambridge English Corpus After removal of thepericarpand testa, 20 seeds from each of the pretreatments, dried as well as undried, were ground in liquid nitrogen. From theCambridge English Corpus Subsequently, the part of thepericarpcovering the embryo was removed and the embryo was gently detached from the adjacent tissue using a dissecting needle. From theCambridge English Corpus The tightly woven cell layers of thepericarpare also barriers to gases. From theCambridge English Corpus Increases in embryo osmotic potential and in the turgor yield thresholds of both the radicle and the endosperm/pericarpenvelope contributed to this change. From theCambridge English Corpus This procedure was necessary in order to moisten thepericarpand endosperm before excision. From theCambridge English Corpus The endosperm andpericarpconsist of non-living tissue and leakage from these tissues is not likely to be influenced by ageing. From theCambridge English Corpus Thepericarpsurface corresponding to the cupule is rough textured, grey and increasingly thickened from the edges to the centre. From theCambridge English Corpus A marked reduction in the mean rate of water loss was recorded for intact acorns compared with those from which thepericarphad been removed. From theCambridge English Corpus This may be at least partly explained by differences in leakage from the pericarps. From theCambridge English Corpus 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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