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Were extracted by different extracting solvents in lab, the results indicated that with the increasing of Mn concentration levels, the speciation of Mn in their roots transform from H2O-extractable species to HCl-extractable species and NaCl-extractable species, showed increases of Mn of oxalate binding and pectate binding or prontein binding in cell wall of roots; Mn of H2O-extractable species were 34.55～50.26% of total Mn in stems and increased with the increasing of Mn concentration levels, which benefited upward transport of Mn; Percentage of Mn of H2O-extractable species were 38.55～44.19% and Mn of HCl-extractable species were 20.66～28.74% to total Mn in leaves, suggesting that most Mn in leaves were the speciation of H2O-solubility organic salts or manganese oxalates. 5. Chlorophyll in leaves of Polygonum hydropiper L.

不同的提取剂对水蓼根、茎、叶的提取结果表明，随着锰处理浓度增加，水蓼根中Mn由水提取态向盐酸提取态和氯化钠提取态转化，说明根细胞壁结合的草酸盐和果胶酸盐或蛋白质结合态的Mn含量随锰处理浓度的增加而增加；在茎中，水提取态锰含量占总锰的34.55-50.26%，且随锰处理的增加其水提取态锰的比例增加，这有利于锰向上运输；水蓼的叶片中，水提取态锰占总锰的38.55-44.19%，盐酸提取态锰占总锰的20.66-28.74%，说明叶片中的锰大部分以水溶性有机盐或草酸锰的形态存在。

In this study, Philodendron andreanum leaves become yellow and green in winter, Ornamental Value reduced as background, Study of foliar fertilizer of nitrogen fertilizer on the growth of new leaves and Ornamental leaves changes in leaf chlorophyll content and Electrolyte leakage.

佘波1，刘瑞霞1，张吉立21山西林业职业技术学院，太原030009；2大庆职业学院黑龙江大庆163255本试验以喜林芋越冬中叶片变黄绿，观赏价值降低为背景，研究叶面喷施氮肥对新生叶片生长以及观赏叶片叶绿素含量变化，电导率变化情况。

Results showed: in Podocarpus leaves, there is only one midrib, the xylem tracheid of midrib vascular bundle is multi-form, transfusion tissue belongs to Cycas-type and transfusion tracheids are isodiametric, the accessory transfusion tracheids between palisade tissue and sponge tissue are developed; in Nageia leaves, there are plenty of parallel leaves, the xylem tracheids of each vein are relatively simple, transfusion tissue belongs to Taxus-type and transfusion tracheids are longer in longitudinal section than that in transverse section, the accessory transfusion tissue between palisade tissue and sponge tissue is absent.

结果表明：罗汉松属叶1条主脉，主脉维管束木质部管胞发达，转输组织为苏铁型，转输组织管胞等径，栅栏组织和海绵组织之间的副转输组织管胞发达；竹柏属叶多条平行叶脉，维管束木质部管胞相对不发达，转输组织为红豆杉型，转输组织管胞纵向伸长，栅栏组织和海绵组织之间不存在副转输组织。

There are some isoforms of PAPs showing inhibitory ability to virus infection in various organs and at different stages of development. Three different species of the protein can be isolated from leaves of pokeweed. Proteins were precipitated with 50-80% ammonium sulfate from leaves in spring, summer and autumn respectively. Proteins were purified on SP cation-exchange then on MQ anion-exchange and finally on MS cation-exchange or on MQ anion-exchange. We found that some new pokeweed antiviral proteins separated from these leaves were different from PAP, PAPII and PAPIII.

对美洲商陆春季、夏季、秋季采集的叶片，用50-80％饱和度硫酸铵沉淀出来的蛋白样品，经过SP阳离子柱后，上MQ阴离子柱，然后把活性蛋白峰再上MS阳离子柱或MQ阴离子柱分离，从春季叶片中分离出四个不同的抗病毒蛋白峰；从夏季叶片中分离出二个不同的抗病毒蛋白峰，这两个蛋白峰与春季叶片中分离出的活性蛋白峰都能重叠上；但从秋季叶片中只分离出来一个抗病毒蛋白峰，它和春季、夏季叶片中分离出的活性蛋白峰都重叠不上。

There are some isoforms of PAPs showing inhibitory ability to virus infection in various organs and at different stages of development. Three different species of the protein can be isolated from leaves of pokeweed (PAP, PAPⅡ and PAPⅢ). Proteins were precipitated with 50-80% ammonium sulfate from leaves in spring, summer and autumn respectively. Proteins were purified on SP cation-exchange then on MQ anion-exchange and finally on MS cation-exchange or on MQ anion-exchange. We found that some new pokeweed antiviral proteins separated from these leaves were different from PAP, PAPⅡ and PAPⅢ.

对美洲商陆春季、夏季、秋季采集的叶片，用50-80％饱和度硫酸铵沉淀出来的蛋白样品，经过SP阳离子柱后，上MQ阴离子柱，然后把活性蛋白峰再上MS阳离子柱或MQ阴离子柱分离，从春季叶片中分离出四个不同的抗病毒蛋白峰；从夏季叶片中分离出二个不同的抗病毒蛋白峰，这两个蛋白峰与春季叶片中分离出的活性蛋白峰都能重叠上；但从秋季叶片中只分离出来一个抗病毒蛋白峰，它和春季、夏季叶片中分离出的活性蛋白峰都重叠不上。

It disserved leaves and formed a Iot of light brown spots as soiled on leaves in initial stages,then the spots turned into brown,in the end the spots turned into grey hoar and pycnidium appeared in the center of the spot, leaves turned yellow and fell off earlier,influenced the output and quality.

叶斑病是近年棉花生产栽培中发生较严重的一种病害，主要侵染植物的叶片，初期在叶片上形成浅褐色水渍状斑点，稍后斑点变褐，后期病斑浅灰色或灰白色，叶片变黄卷曲，提前脱落，从而引起棉花产量及质量的下降。

A new method of disease area mensuration and the percentage of diseases area of tea leaves with computer has been established by using Photoshop software to scan many leaves at the same time, and the further investigation also has been fulfilled. The results showed that when scanned with resolution 150 dpi,there were be short time to scanning and less disk space beenoccupied, and the effect as same as scanned with high -resolution. The results of disease area mensuration and percentage of diseases area of tea leaves using the new method also as same as the results using artificial mensuration, and the efficiency of the new method is much higher than the efficiency of artificial method.

摘 要：建立了通过对茶树叶片进行扫描，利用Photoshop软件同时获得多张叶片及其受害部位的像素值，从而快速计算茶树叶片受害面积以及受害面积百分率的测定方法，并对此方法进行了系统的研究，结果表明：扫描分辨率为150dpi时，扫描时间和存储占用空间较优，测定效果和高分辨率扫描效果基本一致，该方法测定结果与人工测定结果无显著差异，其效率远远高于人工测定。

In the heat stress, the plant's shape changes, changes in Sedum most obvious, the first yellow leaves of the plant below the leaves wither, and finally leaves decay.

在热胁迫下，植株的形态发生了变化，佛甲草的变化最为明显，首先叶片变黄，植株下面的叶片枯萎，最后叶片腐烂。

The reaction of detached leaves Stylosanthes of to Collectotrichum gloeosporioides was tested. The stylo leaves of Mineirao were hypersusceptible in seven days, while stylo leaves of CIAT2312 were rotted in the same time.

对这2种柱花草的离体叶片接种炭疽菌，Mineirao柱花草叶片对炭疽菌发生过敏性反应，而CIAT2312柱花草叶片则腐烂，表明Mineirao柱花草叶片中可能含有抑制炭疽菌的物质。

Leaves densely gray-white pubescent abaxially; basal leaves basally rounded or subcordate; cauline leaves not auriculate; spikes 2-3 cm, 1-1.5 cm in diam.

叶浓密灰白色短柔毛背面；基部的基生叶圆形的或近心形；茎生叶而不是耳形；穗状花序2-3厘米，1-1.5厘米直径 46 P 。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。