【摘 要】
：
We studied three typical heteromorphic leaves of Populus euphratica trees growing in the Wuhai region of Inner Mongolia,China, i.e., lanceolate, broad-ovate and
【机 构】
：
College of Biological Sciences and Biotechnology,Shandong Foreign Languages Vocational College
论文部分内容阅读
We studied three typical heteromorphic leaves of Populus euphratica trees growing in the Wuhai region of Inner Mongolia,China, i.e., lanceolate, broad-ovate and dentate broad-ovate leaves and mainly focused on the changes in chlorophyll fluorescence parameters and free water and bound water content. The results show that the values of Fm (maximal fluorescence yield), Fv/Fm (maximum photochemical quantum yield of PSII) and Fv/F0 (potential quantum efficiency of PSII) of lanceolate leaves were the least on young trees, while these parameters were the least on the ovate leaves of old trees. Compared with young trees, the free water content of heteromorphic leaves of old trees increased significantly, i.e., by 78.94% in lanceolate leaves and in the leaves of broad-ovate and dentate broad-ovate by 10.99% and 10.60%, respectively. Correlation analysis showed that free water content is significantly related to Fv/Fm and Fv/F0 in young trees, while the relationship of total water content with Fv/Fm and Fv/F0 is positive in old trees.
其他文献
Pyruvate kinase catalyzes the rate-limiting final step of glycolysis,generating adenosine triphosphate (ATP) and pyruvate.The M2 tumor-specific isoform of pyruv
早产儿视网膜病变(ROP)防治的关键是早期发现并及时治疗.但目前ROP筛查工作开展不 均衡,除了检查、诊断设备因素之外,人员是制约这一工作开展和水平提高的主要问题.除了加强
目的 了解南京地区婴幼儿杯状病毒腹泻的感染状况、临床表现以及分子流行病学特征.方法 采集2010年7月至2011年6月南京医科大学附属南京儿童医院5岁以下腹泻患儿粪便标本及儿
目的 评价七氟醚极低流量麻醉联合Amsorb Plus钙石灰对患者肝肾功能的影响.方法 择期拟行胃肠手术患者72例,ASA分级Ⅰ级或Ⅱ级,年龄20 ～ 60岁,采用随机数字表法,将患者随机分
目的 通过比较4种勾画方法在宫颈癌FDG PET-CT图像上大体肿瘤体积(GTV)差异,寻找适合临床应用的方法.方法 16例行FDG PET-CT放疗前定位的28个宫颈癌病灶的PET图像,分别用视
目的 确定复合异丙酚时瑞芬太尼抑制维吾尔族患者气管插管及切皮反应的半数有效血浆浓度(EC50).方法 择期拟行腹腔镜胆囊切除术维吾尔族患者30例,ASA分级Ⅰ或Ⅱ级,年龄20～60岁
提出了转基因抗虫棉病虫草害综合防治的一整套技术:采用新克黄枯浸种制钵,向苗床土表面喷洒新克黄枯液,用内吸型杀虫剂克百威与菜籽饼、新克黄枯液、锌.硼.钾.钙.氨基酸LD、
目的 了解移植3种人工真皮支架对Ⅲ度烧伤创面血管化及其瘢痕形成的影响.方法 采用随机数字表法将18只广西巴马小型猪分成壳聚糖支架组、磺化羧甲基壳聚糖支架组、ADM支架组,
试验结果表明,每667 m2用11%井冈.己唑醇60 g对水稻纹枯病有良好的防治效果,与苯甲.丙环唑相比其防治效果相当,但用药成本低。
The results showed that 60% of hexaconazol
研究表明,宫内发育迟缓儿发生胰岛素抵抗综合征的危险性大大增加.动物模型研究证实,宫内发育迟缓个体内调节胰腺β细胞发育的因子及调控糖脂代谢的酶类、蛋白以及胰岛素信号