查询词典 leaf

They first organize and analyze a set of data with the stem-and-leaf diagram. They point out that the diagram is used for a small number of data and the original data can be retained in the diagram. To compare two different set of data of the same nature, they propose the use of a back to back stem-and-leaf diagram.

导师首先做一组数据的处理和分析，干叶图可以用作表达小量的数据，同时原来的数据仍会保留在干叶图中；背靠背干叶图是用作比较两组数据之用，且所有数据仍会保留在背靠背干叶图中。

There were high positive correlations between activity of root and photosynthetic rate of flag leaf, ZRs content and activity in root, ZRs content and photosynthetic rate in flag leaf respectively.

根系活力的下降速度和叶片的叶绿素下降速度相比，根系活力的下降大于叶绿素的下降，根系活力的衰退先于叶片的功能衰退。

Primordium, the establishment of leaf adaxial-abaxial polarity, and the expansion of leaf blade .

早期叶片发育包括三个主要过程：叶原基的起始，叶片腹背性的建立和叶片的延展。

The leaf primordium divides tangentially, then divides in various directions, and forms a young leaf.

叶原基首先进行切向分裂，然后进行各个方向的分裂形成幼叶。

Leaf buttress A leaf primordium, appearing as a protuberance on the side of the stem apex, produced by periclinal division of the tunica and corpus, and associated with a procambium.

叶原座：顶端分生组织上的侧生突起发育成叶的原基，与原形成层有关。

The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.

摘 要：以腐叶土为培养基质，对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究，结果表明：①不同时期播种的同种蕨类的孢子，发育出原叶体和幼孢子体所历经的时间长短不同；②孢子萌发和配子体生长发育的适宜温度约为 15 ～ 24 ℃；③稀有蕨类的孢子萌发率低，而在野外能形成较大种群的蕨类的孢子萌发率高；④用 GA 3 处理孢子可以促进萌发；⑤当原叶体上长出幼孢子体时，原叶体由大变小，由绿变黄， 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失；⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同；⑦孢子萌发需要光；⑧ 1 片原叶体尽管有多个颈卵器，但仅发育出 1 株幼孢子体；⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。

According to pubescence on the abaxial surface of the leaf and on the petiole, and leaf marginal shape, 18 (4%) of the 450 sampled individuals were assigned to intermediate types between the two species.

根据叶片背面和叶柄的被毛情况及叶缘形状3个定性性状，在总共450个个体中，共得到18个(4%)中间过渡类型个体。

Significant selection effects of leaf blade pubescence status on resistance to bean pyralid were found in R1-R6 stages. It indicated that the pubescence status on leaf blade can be used as an indirect indicator for the resistance to bean pyralid in marker-assisted selection breeding.

在大豆生长的R1-R6期，两群体中叶片茸毛着生状态都有明显的选择效应，因而大豆叶片茸毛着生状态可作为豆卷叶螟抗性的指示性状，用于抗豆卷叶螟的标记辅助选择育种。

There existed significant difference of pubescence angle on leaf blade in breeding lines of TA and NTA populations, and very significant correlation was found between pubescence angle on leaf blade and resistance to bean pyralid.

方差分析表明TA和NTA群体家系间叶片茸毛着生角度也存在极显著的差异。

The explant are rhizome and leaf of Pyrola calliantha It has the best result by using 0.1% HgCl_2 for 7min for the explant of rhizome, for 5min for the explant of leaf.

对外植体的消毒方法已经掌握，用0.1%的升汞对鹿蹄草茎段的灭菌采用7min最佳，用0.1%的升汞对鹿蹄草叶片的灭菌采用5min最佳。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。