sieve tubes
英 [sɪv tjuːbz]
美 [sɪv tubz]
网络 筛管; 或筛管; 筛管细胞
双语例句
- The longevity of sieve tubes in D. balansae and D. szemaoensis last 8 12 months and 9 11 months respectively.
南岭黄檀、思茅黄檀的筛管寿命分别为812个月和911个月。 - The arrangement of xylem ducts and phloem sieve tubes of the vascular strands in the nodes was irregular, in which there were some particular "phloem ganglion".
秆茎的节间维管束为断腰型和双断腰型，节部维管束的木质部导管与韧皮部筛管的排列均无规律，并具有多层密集的细胞组成的“韧皮部结”； - In three of the four hosts, the sieve tubes and companion cells belong to a highly specialized type.
4种寄主中有3种筛管与伴胞均属特化程度高的类型。 - A typical veinal vascular bundle was composed of a few vessels, sieve tubes and companion cells, and the vascular parenchyma cells with large nucleus, thick cell wall and cytoplasm, and many organelles, especially mitochondria, in a vascular bundle.
大维管束由数个导管、筛管及伴胞和维管束薄壁细胞组成，且其维管束薄壁细胞壁厚、核大、质浓，线粒体丰富。 - Fibers originate from the same procambium as the vascular bundle elements like vessels, sieve tubes and parenchyma cells, but their differentiation is later.
纤维细胞与维管组织等起源于共同的原形成层束细胞； - Although the sieve tubes are not cut off directly during tapping, the outer part of the sieve tube layer at/ near the tapping cut will be collapsed as a result of the damaging effect from tapping.
虽然割胶时不直接切断筛管，但是在割口及其附近，筛管层外层的筛管在伤害的影响下毁坏。 - After the tissues from the root, shoot, petiole and callus of witches 'broom plants in vitro were dyed with DAPI, fluorescence microscopy showed that strong MLO specific fluorescence emitted from the sieve tubes of these tissues.
DAPI荧光染色镜检结果表明，这种已表现出丛枝的试管苗的根、茎、叶柄的韧皮部筛管，以及已具维管束分化的愈伤组织的筛管部位发出很强的MLO特异荧光。 - Ordinarily, translocation in higher plants is mainly concerned with sugar trans-port in sieve tubes.
高等植物体内有机物的运输问题，通常研究的主要是富含糖分的汁液在筛管中的大量流动。 - After one week the walls of sieve tubes and short parenchyma cells near the wound edge became lignified.
创伤后1周，创口附近的筛管及基本组织中的短细胞的细胞壁变成木质化。 - In the other species the sieve tubes have horizontal end walls with simple sieve plates, and contain P-protein.
其余3种筛管分子端壁均为横向，具单筛板，具P-蛋白质。 - Hence the conducting sieve tubes do not necessarily be cut off at the usual cut-ting depth required.
因此，按规定的深度割胶，并不直接切断有功能的筛管。 - The mechanical property of three inflation sieve tube base tubes was influenced by well temperature in different extent.
即，三种膨胀筛管基管材料的力学性能都不同程度地受到井下温度场的影响。 - It indicated that tolerant characteristics of varieties had related to TSA of phloem sieve tubes and xylem conduits. 3.
研究明确了品种耐虫性与韧皮部筛管、木质部孔纹导管的横切面面积数量有关。 - The vertical system of secondary phloem consists of sieve tubes, companion cells, parenchyma cells, stone cells and secretory ducts, and radial system were composed with the phloem rays.
次生韧皮部由垂直系统的筛管、伴胞、韧皮薄壁细胞、石细胞、乳汁道以及水平（径向）系统的韧皮射线组成。