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。
3 : chlorophyll content : low - temperature can restrain the biosynthsis of chlorophyll and destroy its structure . the contents of chlorophyll a , chlorophyll b and chlorophyll a + b in controls were significantly lower than in transgenic seedlings . the ratio of chlorophyll a / b had the similar result 低温处理后，对照中叶绿素a 、叶绿素b 、叶绿素a + b总含量均显著低于转基因苗，叶绿素a b的比值反映叶绿体中类囊体膜的垛叠程度，对照的叶绿素a b的比值低于转基因苗。
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。
Both the seedling and the root was rotted , the vigor of seedling was severely weakened consequently . in addition , chlorophyll of the seedling decreased with increasing concentration , when at 25mg / ml , chlorophyll content was less than 60 . 13 % of the control group . root activity had the similar trends to cha nge of chlorophyll , and it only reached 52 . 54 % of the control group 对小麦幼苗生理生化指标的研究表明：叶绿素含量和根系活力随着青蒿浸提液浓度的升高均明显降低，在浓度为25mg / ml时，叶绿素含量仅不到对照的60 . 13 ，根系活力仅为对照的西南农业大学硕士学位论文，论文摘要
With development and maturation of citrus fruit , chlorophyll content of citrus fruit peel decreased , being acompanied by a gradual decrease in a - carotene and p - carotene which are known to be in the upstream of carotenoid biosynthesis pathway . the decrease continued up to complete vanishment of the carotenes . on the other hand , p - cryptoxanthin , p - citraurin and zeaxanthin that are in the downstream of carotenoid biosynthesis pathway increased steadily and became the principal carotenoid components 随着柑橘果实发育和成熟，果皮叶绿素含量下降，与此同时，位于类胡萝卜素生物合成途径上游的-胡萝卜素、 -胡萝卜素等胡萝卜素成分逐渐下降直至消失，而在类胡萝卜素生物合成途径下游的-隐黄质、 -柠乌素、玉米黄素等叶黄素成分逐渐上升，使得类胡萝卜素总量先略微下降后迅速上升；果实褪绿并呈现其特征色泽。
Both reduced irradiance and defoliation caused decreased slm ( specific leaf mass ) . ( 4 ) generally , chlorophyll content and chlorophyll concentration increased with reduced light levels , the ratio of chlorophyll a to chlorophyll b of defoliated plants was higher than those of controlled plants , while in latter period , the results were contrary to that of the former period ( 4 )叶绿素含量和浓度总体上都随光照水平的降低而升高，叶绿素a / b在高光条件下显著大于低光水平下的植株，叶损失植株的叶绿素a / b值处理初期小于未受损植株，处理后期则大于未受损植株。
It meaned that simulated acid rain made the toxic effects of zn or cd on growth of the plants more serious . the fresh weights and chlorophyll contents of phaseolus vulgaris l were the highest when ph value of acid rain was 4 . 5 , zn concentration was 60 mg / kg , and or cd concentration was 0 . 5 mg / kg . this showed that lower acidity of simulated acid rain and lower concentrations of zn or cd could promote growth of the plants 本试验中，酸雨加zn或者酸雨加cd使小白菜鲜重小于单一污染处理，说明酸雨增加了zn 、 cd对小白菜的毒害作用；而当酸雨ph值为4 . 5 、 zn浓度为20mg / kg或cd浓度为0 . 5mg / kg时，四季豆鲜重达到最大值，这表明低强度的酸雨和低浓度的zn 、 cd促进四季豆的生长。
