但网络的最边缘——叶子，却具有不同的结构，与木质部和韧皮部不同，叶子的纹路交叉并成环。
But the very end of such a network, the leaf, has a different architecture. Unlike the xylem and phloem, the veins in a leaf cross-link and loop.
他的观点是，在某种程度上二者均由运输物质的网络构成——公路，铁路，水路以及煤气管，污水管还有电缆线都在输送物质，动物血管和植物运输汁液的木质部、韧皮部也是如此。
Roads, railways, water and gas mains, sewage pipes and electricity cables all move things around. So do the blood vessels of animals and the sap-carrying xylem and phloem of plants.
一旦口针进入韧皮部持续吸食阶段，蚜虫在三个部位的取食行为没有太大的差异。
And no significant differences were found in feeding behaviors among aphids on three plant parts once sustained ingestion started in the phloem.
汞通过韧皮部被转运到树皮中，有选择性地在其中沉积，而非在自己不易更新的部位沉积。
Mercury is carried there by the phloem and selectively deposited in it, rather than in the plants' more permanent parts.
残存的韧皮部也可以脱分化形成愈伤组织，此外，还存在愈伤组织源于木质部的情况。
The rest of phloem also produced callus through dedifferentiation. In addition, there was callus from xylem.
树皮的汞含量与韧皮部相近。
初生韧皮部：指幼嫩植物中来源于原形成层的韧皮部。
Primary phloem PHLOEM derived from the procambium in the young plant.
地下茎加粗过程中形成三生结构，其异常结构是由于次生韧皮部外侧发生的额外形成层所致，其起源于薄壁细胞；
The growth of hypogeal stem contain tri-growth, and the anomalous secondary growth is the result of supernumerary cambium that derived from the outmost elements of secondary phloem.
对处于休眠期的八个品种桑树韧皮部的过氧化酶和酯酶同功酶作了分析，未发现抗病性与同功酶之间有相关性。
After the assay of the peroxidase and esterase isoenzymes in the phloem of eight mulberry varieties in rest stage, no relativity is found between the resistance and isoenzymes.
维管束由维管束鞘、木质部、韧皮部和大型薄壁细胞组成。
The vascular bundle consists of vascular bundle sheath, xylem, phloem and big parenchymatous cells.
每个维管束的韧皮部外面有数层厚壁细胞，增加叶柄的机械支持作用。
There are some sclerenchymatous cells outside the phloem of each vascular bundle to increase the supporting force of the petiole.
而对于以山梨醇、甘露醇、半乳糖醇等多元醇为光合作用初级运输物的植物中，硼可以与多元醇形成络合物而在韧皮部中自由运输。
But boron also exhibits rapid and significant phloem mobility in species for which sorbitol, mannitol, or dulcitol are the primary photosynthates since these polyols can effectively complex boron.
栽培丹参根的周皮细胞层数少、色淡，韧皮部与木质部比值小，而野生丹参根的周皮细胞层数多、颜色重，韧皮部与木质部比值大。
In cultivated salvia miltiorrhiza roots light-colored periderm contained less layers of cells and low ratio of phloem to xylem compared with those in wild salvia rniltiorrhiza roots.
磷高效小麦基因型的韧皮部蔗糖运输速率和根冠比低于磷低效小麦基因型；
Compared to low P efficient genotype, high P efficient genotype was lower in phloem sugar translocation rate and R/S ratio.
是水稻的主要害虫之一，它刺吸水稻韧皮部汁液，干扰光合产物由源向库的运输，影响水稻的生长和发育。
The BPH feeds mainly on the stems, and sucks assimilates from the phloem. BPH feeding interferes with the translocation of photosynthates from source to sink, hence, affects plant and development.
单中柱：原生中柱的一种类型，是由韧皮部、中柱鞘和内皮层包围着内方的木质部构成的实心中柱。
Haplostele a type of protostele having a solid strand of stele with the xylem on the inside encircled by phloem pericycle and endodermis.
结果：野生狭叶柴胡的木栓层，韧皮部，木质部的显微特征均于药典上的记载有所不同。
Result: The phellem, phloem and xylem of wild bupleurum scorzonerifolium are different from those in the pharmacopoeia .
韧皮部及其邻近组织是大多数蚜虫的主要取食部位。
Phloem elements and adjacent tissues are the principal feeding sites for most aphids.
在横切面上，次生韧皮部的面积比次生木质部大得多。
In the transection section, the area of secondary phloem is much larger than secondary xylem.
韧皮部中筛管分子的端壁是由4—6个梯状排列的筛域组成的复筛板。
The end walls of sieve-tube elements in the phloem have 4-6 specialized sieve areas which together form compound sieve plates.
结果大黄中的活性成分含量以韧皮部最高，髓部次之，木质部最低。
Result The active component content in phloem was the highest, while, successively, in pith and in xylem.
在割胶树的树皮中，有输导功能的韧皮部的厚度不超过1毫米。
In the bark of tapped trees, the thickness of the conducting phloem is less than 1 mm.
药隔维管束韧皮部的伴胞解体。
The abortion of companion cell of phloem of anther connective vascular bundle.
单茎鞘重与大维管数、维管总面积相关显著，与韧皮部总面积相关极显著。
The weight of a single sheath is correlated with the number of large vascular bundle and the area of vascular bundles, is correlated significantly with the area of phloem for vascular bundles.
结果表明，不同杨树品系间韧皮部单宁含量差异极显著，木质部单宁含量差异不显著；杨树各品系的单宁含量与杨树的被害株率关系不紧密。
Results showed that a significant difference in tannin content was found in phloem of different poplar strains, while the difference in xylem was not obvious.
根的次生韧皮部则由筛胞和韧皮薄壁细胞组成。
The secondary phloem consisted of sieve cells and phloem parenchymas.
初生木质部与初生韧皮部之间可见到2—3层排列规则或不规则的薄壁组织细胞，但是没有维管形成层的发生。
Between primary xylem and primary phloem there are 2-3 layers of parenchymatous cells, regularly or irregularly arranged, but no cambial zone can be recognized.
韧皮部溢泌速率降低伴随汁液中钾离子浓度降低和蔗糖浓度增高。
The fall of phloem exudation rate concurred with a decrease of potassium concentration and an increase of sucrose concentration of sap.
同化物在韧皮部中以液流形式运输，液流中的水主要来自木质部。
The assimilate transports in the phloem by liquid form and the water of the liquid mainly comes from the xylem.
同化物在韧皮部中以液流形式运输，液流中的水主要来自木质部。
The assimilate transports in the phloem by liquid form and the water of the liquid mainly comes from the xylem.
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