first leaf

With the lowering of the stalk position ( from the first leaf to the ninth leaf ) the invertase activity is decreasing .

随着叶位的降低（第一叶位→第九叶位），蔗糖酶活性也在降低；

The apical cell of the first leaf and of the first root originate almost at the same time after the embryo reaches to the 32-celled phase . When the last one falls , I must die , too .

胚胎在32细胞阶段后，第一叶顶端细胞与第一根顶端细胞几乎同时发生。当最后一叶掉落时，我一定也会死去。

I see the first leaf falling .

我看见第一片落叶。

Your son will be out of bed before the first leaf falls .

在第一片树叶落下之前，你的儿子就会好了。

The first leaf coloring date delayed and the growing season extended .

叶初变色期主要表现出推迟趋势，生长季长度以延长趋势为主；

I can see the first leaf falling , it 's all yellow and nice !

我看到第一片叶子飘下，完全黄色的叶子如此美丽！

The form of bud germination , especially seed structure and the morphology of the first leaf ;

幼芽萌动的形式，尤其种子结构和第一片叶的形态：胚芽叶萌发时胚芽鞘膨大的形态；

But in this season it has a little depressed feeling when you see the first leaf falling .

但在这个季节里，当你看见第一片落叶飞落，也会有一点点的忧郁。

The accumulated temperature from sowing to the first leaf age ranged from 327 ℃ to 355 ℃ .

播种至第1叶龄需积温327～355℃。

Following are results obtained : After the first leaf differentiated , total leaf area increase exponential adapting to accumulated temperature ( At ) .

冬小麦苗期叶片分生以后，随着积温的增加，叶面积呈指数增加。

On the basis of the structure of vegetable organs , the first leaf and root are the earliest organs in the development of embryo .

据营养器官的形态结构判断，在海金沙胚胎发育中最早出现的营养器官是叶和根。

The results showed that the differentiation of floral primordium and flower firstly occurred at the axil of the first leaf .

结果显示花原基分化和开花的起始节位是第一真叶节；

When the embryo produced its first leaf on day 10 after anthesis , the aleurone cells formed 1 to 2 layers .

开花后10d，胚具1叶，糊粉层1～2层；

The ideal length of the first leaf under the top leaf is 40-44 cm for the early crop and 42-60 cm forthe late crop .

顶下1叶长：早季40～44cm、晚季42～60cm；

The question is : when you pick up the first leaf from the ground , can you recognize the person you 've been waiting for all these years ?

至于幸不幸福，关键在于当你拾起夏末的第一片落叶，能不能把你一直守望的这个人认出？

Cotyledon ( seed leaf ) the first leaf of the embryo of seed plants , which is usually simpler in structure than later-formed leaves .

子叶：种子植物胚胎的第一片叶，在结构上通常比后来形成的叶简单。

The result showed that the first leaf sheath length increased significantly than control , but seedling height and the second leaf sheath increased slightly in GA3 soaking experiment .

结果表明，GA3浸泡处理的幼苗第一叶鞘长度较对照显著增加，苗高和第二叶鞘长度增加效应不显著；

Under the same shoot first leaf , the second leaf , mesophyll cells gradually differentiated into the more obvious morphological differences between palisade and spongy tissue .

同一新梢芽下第一叶、芽下第二叶，叶肉细胞逐渐分化成形态区别较明显的栅栏组织和海绵组织。

The second leaf takes place at the basal part of the first leaf and originates from the shoot apex cells when the first leaf pierces the calyptra .

第一叶突出帽状体之后，由第一叶基部保留下来的茎干顶端细胞产生第二叶。

The main period of egg hatching , which is the favourable opportunity for its control , lasts ho the flower fall-en to the first leaf Spreda out .

越冬卵孵化盛期为落花后至第一片叶展开之际，这是防治的有利时机。

Both SOD , POD activities and the increasing extent of SOD , POD activities were most in the second leaf base , less in the second leaf tip , the least in the first leaf .

两种酶活性及增加幅度均以第二叶基部最大，尖部次之，第一叶最小。

【 Result 】 The results indicated that the first leaf photosynthesis rate and stomatal conductance and transpiration rate of wiping out upper root were decreased immediately by 10.25 % , 53.99 % and 46.26 % respectively .

【结果】剪除全部根系后，顶一叶叶片的光合速率、气孔导度和蒸腾速率分别立即平均下降10.25%、53.99%和46.26%。

Leaf growth of varieties was as follows : The first leaf , scale leaf had more trichomes , the second leaf , the third leaf , the fourth leaf , fish leaf had fewer trichomes .

以上几个品种叶片发育的规律为：芽下第一叶、鳞叶表皮毛数量较多，芽下第二叶、芽下第三叶、芽下第四叶、鱼叶表皮毛数量较少。

Stomata of the first leaf buds , scales leaf were not fully developed , stomata of the second leaf tent to mature . Stomata of the third leaf , the fourth leaf , fish leaf was mature .

芽下第一叶、鳞叶气孔器发育不完全，芽下第二叶气孔器发育趋向成熟、芽下第三叶、芽下第四叶、鱼叶气孔器发育成熟。

To young wheat plant characters , which are seedling height , first leaf length , number of seminal roots and number of second-class roots , which tendency of ion implant effects is same : first increase , then decrease , and then increase , finally decrease .

离子注入对苗高、第一叶长、初生根和次生根4个苗期性状影响趋势相同，均随着剂量的增大而呈先升后降再升再降的趋势。

Thus , the values 4.8 and 7.8 of RVI ( 810,560 ), and 41.1 and 47.1 of SPAD on the first leaf could be considered as the threshold values of nitrogen deficiency at jointing and booting , respectively , which would be used for determining desirable nitrogen dressing amount .

因此，可将RVI（810560）值4.8、7.8，顶1叶SPAD值41.1、47.1分别作为拔节期与孕穗期氮素营养的丰缺阈值，并以此确定相应的追施氮量。

The earth gives fruit by herself ; first the leaf , then the head , then the full grain .

地生五谷，是出于自然的。先发苗，后长穗，再后穗上结成饱满的子粒。

Results also showed that the expressional signal of the first fresh leaf in spring is stronger than that in autumn .

结果还显示，春梢第一片叶比秋梢第一片叶表达信号强；

Treating the first true leaf with oligosaccharide could reduce the disease severity on upper leaves , which showed remarkable resistance .

诱抗剂处理第一片真叶后可减轻上部叶片发病，上部叶片呈现较明显的抗病性反应特征。

Mechanical wounding at stage of cotyledon or the first true leaf can induced all kinds of defensive enzyme activities significantly in upper leaves .

机械损伤黄瓜子叶或者第1真叶后，均能显著诱导上部叶片内各种防御酶的活性。