After 60 days of growth the leaf net weight of transgenic tobacco plants has increased by108 . 4 % . 112 . 7 % respectively compared to wild - type controls . furthermore , chlorophyll in transgenic plants has risen by 34 % . 38 % compared to wild - type controls 5与对照相比，转基因烟草表现出叶片生长和叶绿素含量增加：在生长了60天之后，转基因烟草植株比对照植株相同部位叶片的平均干重分别增加108 . 4
1 , 2 . 3 , 4 , 5 , 6 respectively . with the increase of lead level , the changing trend of spad and soluble sugar content and the activity of nitric acid reverting enzyme ( nr ) had appeared the same direction , which ascended first and then fell 2植物对pb污染的生理生态效应为了揭示pb污染对富集pb植物的生理代谢活动的影响，测定了叶片叶绿素含量、可溶性糖含量、硝酸还原酶的活性和脱落酸含量等生理指标。
Effects of cd on growth , photochmecal efficiency , chlorophyll content and net photosynthesis of canna indica linn and rumex acetosa l were studied so that the theoretical basis of phytoremediation of pollution by cd could be provided )为实验材料，研究cd胁迫对美人蕉和酸模的生长、光化学效率、叶绿素含量以及净光合强度等生理指标的影响，探讨cd对高等植物的毒害效应，以期为重金属cd污染的植物修复技术提供理论依据。
The results showed that the fourth treatment remarkably increased the rate of vegetative growth and improved chlorophyll content ; the fourth and the third treatments could reduce the harmfulness of elevated temperature ; according to different of resistance , " yx52 " was stronger than " gh611 " and " kk581 " was the weakest of all 结果表明，处理4对植株营养生长及提高叶绿素含量效果最为显著；处理4与处理3能缓解高温对大花蕙兰植株生长的不利影响。
The results indicated that the plant growth regulator could increase plant height , main root length , lateral root number , root / shoot ratio , chlorophyll content , proline content and the activity of peroxydase ( pod ) , and improve the ability of drought - resistance of soybean seedlings 结果表明，植物生长调节剂可促进大豆幼苗茎叶生长和主根伸长，增加侧根数，加大根冠比，提高叶绿素含量、脯氨酸含量和过氧化物酶( pod )活性，从而增强了植株的抗旱能力。
With the increace of zn stress , the content of chlorophyll , superoxide dismutase ( sod ) activity and soluble protein content dropped significantly , peroxidase ( pod ) and catalase ( cat ) activities rised at first and lowered later , and malonyl dialdehyde ( mda ) content increased drastically 随锌胁迫程度的增大，叶绿素含量、 sod （超氧化物歧化酶）活性和可溶性蛋白含量呈下降趋势；而pod （过氧化物酶）和cat （过氧化氢酶）活性则先升后降； mda （丙二醛）含量上升。
Branches and leaves dry weights / roots dry weights is higher in cyclobalanopsis multinervis and michelia foveolta under shading , which revealed that growth of roots were restrained by shading . from june to october , special leaf weights , . chla / chlb and soluble sugar contents were decreased in cyclobalanopsis multinervis and michelia foveolta under shading , but leaf w 在6月至10月的整个生长季节，遮荫处理使多脉青冈和金叶含笑的比叶重下降，叶片含水量上升，叶绿素含量上升， chla / chlb下降，类胡萝卜素含量上升，可溶性蛋白含量上升，可溶性糖含量下降
The results showed that the cucumber seeds soaked with extracts of total alkaloid , dissoluble alkaloid and fat - soluble alkaloid from p . multisectum ( maxim . ) bobr . , the activities of amylase , protease and lipase during seed germination were inhibited , the seed vigor and germination rate were suppressed , and respiration rate of seedling was slackened ; root activity , chlorophyll content and activities of nitrate reductase , superoxide dismutase sod ) and peroxidase ( pod ) of cucumber seedlings during seedlings growth were increased 结果表明，多裂骆驼蓬总生物碱提取液、水溶性生物碱提取液和脂溶性生物碱提取液浸种均抑制黄瓜种子萌发过程中淀粉酶、蛋白酶和脂肪酶活性，种子活力和萌发速率降低，呼吸速率减慢；幼苗生长过程中根系活力、硝酸还原酶活性升高，叶绿素含量增加，超氧化物歧化酶( sod )和过氧化物酶( pod )活性提高。
The maize and neorgelia cawlinae meyendor ffii were treated with uv - b radiation with the intensities of 0uw . cm - 2 ( ck ) , 10uw . cm - 2 ( r1 ) and 15uw . cm - 2 ( r2 ) , the duration of uv - b treatment were ten hours per day ( from am8 : 00 to pm18 : 00 ) . the effect of uv - b radiation on the photosynthesis was studied , and the results showed as follows : ( l ) the effects of uv - b radiation on photosynthesis of maize and neorgelia cawlinae meyendor ffii the results of the experiment show that the photosynthesis of maize seedlings was restrained because of the decrease of chlorophyll contents activity of hill reaction stamotal conductance activity of pepcase and atp content caused by increased uv - b radiation , and it was more restrained under higher uv - b radiation . though the activities of rubpcase and pepcase were decreased , the chlorophyll contents activity of hill reaction stamotal conductance of mature maize were not affected , therefore the photosynthesis of grown - up plant was not affected Cm ~ ( - 2 ) ( r2组)的uv - b辐射，每天处理10小时( 8 ： 00 ? 18 ： 00 ) ，直至玉米成熟，以自然光照为对照( ck组) ，对增强uv - b辐射条件下玉米和红彩凤梨光合作用的响应作了深入的研究和探讨，结果如下： ( 1 ) uv - b辐射对玉米和红彩凤梨光合作用的影响研究结果表明，因增强uv - b辐射降低了玉米幼苗叶片的叶绿素含量、 hill反应活力、气孔导度、 pepcase活性和atp含量，从而影响了玉米幼苗的光合作用，使其光合速率下降，且随uv - b辐射强度的增加其影响程度加大；而玉米成株在增强uv - b辐射环境下其叶绿素含量、 hill反应活力、气孔导度等未受影响，虽然其rubpcase活性和pepcase活性有所下降，但总体上其光合作用受到的影响不大。
3 ) effect on chlorophyll contents the chlorophyll is the important pigment for the photosynthesis of plants . the measurement results showed that the chlorophyll contents in transgenic tomato were highter than that of the control , which indicated the damage extent that the chlorophyll in transformants suffered was down to that of the control plants at low temperature 3 )叶绿素含量的测定： chla是植物进行光合作用的重要色素，少数chla为光合作用中心色叶绿体小分子热激蛋臼基因导入番茄的研究素； cib作为捕光色素参与光合作用。
