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Of ch a, and value of cha b/ carotinoid and cha b/flower pigment are both reduced in ChangLi 15 and Purple leaf plum, the color of the leaf is moreobvious; Under shade environment, ch a/b is reduced.

叶绿素对干旱胁迫的敏感性大于类胡萝卜素，干早胁迫对叶绿素b的伤害大于叶绿素a，到重度胁迫时，两个品种叶绿素b含量分别比对照降低了32.9％和37.7％。

UV-B-induced damage in such leaves could be reduced with 0.5 mmol.L-1 NaHSO3 treatment; brown spots on the leaf surface were reduced in number, the degree of leaf wilt was reduced, degradation of chlorophyll and carotinoid was reduced and flavonoid level was increased. With the NaHSO3 treatment, the content of H2O2 in leaves of Phaseolus vulgaris under enhanc ed UV-B radiation was significantly lower than in controls, and the activities of antioxidant enzymes were higher with treatment than in controls.

结果表明：与未处理对照相比较，用0.5 mmol.L-1 NaHSO3处理的离体红芸豆叶片表面褐色斑减少、边缘蜷曲及萎蔫程度降低；且能延缓叶片中叶绿素和类胡萝卜素含量的降低；使类黄酮含量升高；叶片中过氧化物酶和抗坏血酸过氧化物酶活性升高，过氧化氢(H2O2)含量降低。

The results showed that plant height increasing speed was significantly slow at the former and middle stage when K level was above 180 kg/hm2.On the contrary,the height of case-hardened plant improved markedly.When the K level was above 135 kg/hm2,the stem girth and maximal leaf area differed significantly as compared with CK,so did LAI.Yield and product value per unit area took the first place when 180 kg/hm2 potassium was used.Average price and proportion of middle and first grade tobacco leaf of 225 kg/hm2 potassium treatment were the highest as compared with other treatments and CK.Four economic characters of the two treatments differed at obvious significant level as companied with CK.The total sugar and K2O were increased,nicotine, total N,protein and Cl- were decreased with increased K levels.The potassium lacked symptom was alleviated with increased K levels,no symptoms was observed when 180 kg/hm2 potassium was used,the degree of weather infected fleck was decreased when the K levels was increased.

结果表明，在烟株生长前中期，当施钾量达到180 kg/hm2以上时，株高增长显著变慢，而定型株高则显著增高；茎围和最大叶的面积在施用135 kg/hm2以上的处理与CK之间的差异性达到极显著水平，叶面积指数也存在显著差异；单位面积产量和产值以施用180 kg/hm2的处理居首位，中上等烟比例和均价以施用225kg/hm2的处理最高，这两种处理的以上4个经济性状与CK之间存在极显著性差异；烟叶中的总糖和K2O含量随施钾量的增加而上升，烟碱、总氮、蛋白质和C-含量则下降；缺钾症状随施钾量增加而减轻，至施用180kg/hm2时已无缺钾症状；烟叶气候斑的发生程度也随施钾水平的提高而减轻。

The results showed that different Catalpa spp. had significant variance in height, diameter, length to width of leaf, leaf numbers per plant and net photosynthesis rate.

结果表明：不同品种楸树幼树的高生长、直径生长、叶片长宽比、单株叶片数和净光合速率等生长和生理指标存在显著差异。

This leaf's area which expects a plant quickly increases, the growth speed, and the nutrient of above 90% assigns a leaf to grow to the caulis.

此期植株的叶面积迅速增加，生长加快，90%以上的养分分配给茎叶生长。

The influences of decay coefficient of the cavity and the intensity of the field on the phase distribution as well as its fluctuation are discussed.The results show:if there is absence of the phase damping,the phase distribution oscillates with the period π/λ.It presents single leaf at t=nπ/λ,but it splits into multi-leaf construction during the evolution period due to the interaction between the field and the atoms.

结果表明：当腔不存在损耗时，光场相位分布概率以π/λ作周期性振荡；且在t=nπ/λ时刻，光场和原子是退纠缠的，相位分布概率曲线在极坐标图中呈单叶型结构；但在演化周期内，由于光场与原子的相互作用相位分布概率曲线会劈裂为多叶型结构。

In the experiment, wheat (NongDa 189) plants were grown on a sand culture in a greenhouse. Relationship between leaf area and characteristic of root branching of winter wheat seedlings were studied, In addition, effects of phosphorus deficiency on leaf area, root morphology and measuring methods of root architecture were studied.

试验选用农大189号小麦为试验材料，进行温室内砂培试验，研究了冬小麦苗期积温、叶面积与根系分枝之间的关系，并探讨了磷胁迫对冬小麦苗期叶面积及其根系构型参数(主轴数量、长度、直径等)的影响，结果表明： 1。

There was significant positive correlation between photosynthetic rate and leaf chlorophyl content, increasing the phosphorus application is beneficial to increasing leaf chlorophyl content and net photosynthetic rate.

叶绿素含量与光合速率呈显著正相关，增施磷肥有利于提高小麦叶片的叶绿素含量，从而提高小麦叶片的净光合速率。

The crown is about 1-2.5m tall and the breadth of the crown is about 1-1.5m. It adapt to grow on high density. 2. The idioplasmic resources of Lonicera fragrantissima are abundant, It can be classified 8 types by the differences of the shape of fruits: cherry shape, drop shape, dumbbell shape, ellipse herringbone shape, inverse egg herringbone shape, chook foot shape, square round herringbone shape, taper herringbone shape; be classified 3 types by the color of fruits: simple red fruit, red fruit and mauve fruit; be classified 4 types by the shape of leaf: roundness, ellipse, egg round, ellipse wrap around leaf.

以果形差异可分为樱桃果型、偏坠状果型、哑铃状果型、椭圆人字状果型、倒卵人字果型、鸡爪状果型和矩圆人字果型、嘲锥人字果型等8个类型；以果色可分为浅红色果类、红色果类和紫红色果类3个类型，以叶形可分为圆形叶类、椭圆形叶类、卵圆形叶类、椭圆披叶形叶类等4个类型，以冠形可分为高于疏枝冠形类、下垂密枝低冠形类和中高干密枝冠形类等3个类型，根据各类型特点选择鲜果食用类、饮料栽培类、露地观赏类、插花观赏类、盆景观赏类和药用栽培类等一批优树。

And 42.9%,followed by leaf length and leaf width,with the coefficient of variation reaching 33.3% and 30.0%.

和42.9%。其次是叶长和叶宽，它们的变异系数分别为33.3%和30.0%。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了