水杨酸与柠檬酸对秋菊鲜切花保鲜过程中生理特征的影响..docxVIP

本科学生毕业论文题 目水杨酸与柠檬酸对秋菊鲜切花保鲜过程中生理特征的影响学 院生命科学学院专 业生物科学学生姓名李金杰学 号101001059指导教师张晓平职称副教授论文字数 字完成日期 2014 年 4 月 22 日论文题目 水杨酸与柠檬酸对秋菊鲜切花保鲜过程中生理特征的影响 学生姓名、学院：李金杰,生命科学学院中文摘要以秋菊鲜切花为材料，用10 g/ L蔗糖、5 mg/ L氯化钙、50 mg/ L青霉素、和蒸馏水，分别加入50 mg/ L 水杨酸、100 mg/ L 水杨酸、50 mg/ L 柠檬酸和100 mg/ L 柠檬酸配置成4个不同浓度梯度的保鲜剂，培养秋菊鲜切花一段时间并定期取材，测定不同日期秋菊鲜切花的生理指标，包括叶片的叶绿素含量、POD活性、SOD活性以及叶片和花瓣的可溶性糖含量，以此定量分析出不同浓度的水杨酸、柠檬酸对于秋菊鲜切花保鲜作用的影响，甄选出保鲜秋菊鲜切花最适合浓度的水杨酸与柠檬酸，这将对市场保鲜秋菊鲜切花具有极其重要的意义。结果表明：加有浓度为50 mg/ L的水杨酸、浓度为50 mg/ L的柠檬酸的两种保鲜剂,对秋菊鲜切花的叶绿素含量、POD活性、SOD活性以及可溶性糖含量有较明显的效果，对秋菊鲜切花有较好的保鲜作用关键词：秋菊鲜切花；保鲜；水杨酸;柠檬酸；生理指标 英文题目Alternanthera philoxeroides has an effect on physiological index of Zoysia matrellia seeding 学生姓名、学院：Fu XueHao,College of Life Sciences英文摘要The study used Alternanthera philoxeroides as material, the subjects plants were Zoysia matrellia. By using water-soluble allelochemicals method, water-soluble allelochemicals was used to deal with Zoysia matrellia and measured those physiological index . The results showed that the different density of water-soluble allelochemicals of root,stem, leaf has different effect on the physiological index on subjects plants. And with improvment of density of water-soluble allelochemicals , chlorophyll content in leaf of Zoysia matrellia ,activity of catalase ( CAT) , peroxidase ( POD) ,superoxide dismutase ( SOD) presents the tend ,increasing in advance and then decreasing ,and the inhibition effect becomes stronger. Water-soluble allelochemicals makes the content of malondialdehyde( MDA) in plant improve. The tested crops were oxidative stressedby water-soluble allelochemicals from Alternanthera philoxeroides. Antioxidant enzyme systems were inhibited. The aqueous extracts from the different organizations of Alternanthera philoxeroides affected the germination and growth. 英文关键词Alternanthera philoxeroides; Zoysia matrellia;allelopathy; water-soluble allelochemicals ; physiological index目 录摘要6引言71、材料与方法81.1实验材料81.2实验方法81.2.1母液的制备81.2.2马尼拉草幼苗水培实验81.2.3马尼拉草生