| 词汇 | rootstock |
| 释义 | rootstock noun[ C ] biology specializeduk /ˈruːt.stɒk/ us /ˈruːt.stɑːk/ a stem to which part of another plant is joined so that both parts can grow together and get an advantage from a good feature of the stem根状茎;根砧木 Parts of plants axil bark bilobed blade bulb caning cascara sagrada corolla endodermis inflorescence knot pistil rooty rosella seed coat seed pod sessile sting taproot tubule Examples of rootstockrootstock Once clones are evaluated on a standard rootstock, it would be wise to use this rootstock for commercial plantings. Differences in geography, cultivars, rootstocks, soils, microclimate and growers' personal preferences determine the production practices and materials used in organic apple orchard management. Mycorrhizal plants of these rootstocks were more resistant than non-mycorrhizal ones after five days of drought. Regional assessments of rootstock performance are already known to be important. The pot-medium water content in mycorrhizal un-irrigated plants of these rootstocks was 0.185 and 0.216 cm3 cm-3 respectively. Given the well-established relationship between vigour and yield in cocoa, the desired rootstock influence is a positive change in 'yield efficiency'. There was no indication of an interaction between rootstock and scion for any of the traits that were studied. The yields showed no evidence of a major effect of rootstock or interaction with scion in this trial. Mn levels were satisfactory on all rootstocks except for the low levels on the two citranges. Seeds for rootstocks were produced by manual pollination with flower buds capped before anthesis and after manual pollination to prevent accidental cross-pollination. The most vigorous rootstock had a trunk circumference 14 % greater than the weakest. High-yielding genotypes are usually salt-sensitive, so grafting them onto resistant rootstocks can be a feasible strategy to improve salt tolerance. Resistant rootstocks are used to control grape phylloxera damage, but the phylloxera/grape interaction is poorly understood. Photosynthesis and stomatal conductances were affected by drought but in very different ways in each rootstock. The next section describes propagation and rootstock development, and the plant material used in extensively well-documented worldwide breeding programmes and their goals and successes. 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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