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1.
青霉素对黄瓜种子萌发及幼苗生长的影响 总被引：1，自引：0，他引：1
用不同浓度的青霉素溶液处理黄瓜种子，结果表明100mg／L和200mg／L处理可提高黄瓜种子的发芽率、发芽势，促进幼苗子叶面积和真叶面积的扩大，增加下胚轴粗和根鲜重，提高成苗率。 相似文献
2.
采用双因素完全随机设计,进行层积和GA3溶液浸种处理的三花冬青种子田间出苗试验。结果表明：三花冬青种子具休眠特性,但不存在隔年萌发现象。层积处理可有效打破三花冬青种子的休眠,提高出苗率,其中以自然层积处理的效果最好。GA3溶液浸种处理对打破三花冬青种子的休眠也有显著的促进作用。GA3溶液浸种处理与层积方式的交互作用对三花冬青种子出苗率无显著影响。 相似文献
3.
用不同浓度的青霉素溶液处理黄瓜种子,结果表明100mg/L和200mg/L处理可提高黄瓜种子的发芽率、发芽势,促进幼苗子叶面积和真叶面积的扩大,增加下胚轴粗和根鲜重,提高成苗率. 相似文献
4.
渗透调节技术及其在种子处理中的应用 总被引：1，自引：0，他引：1
本文阐述了渗透调节的概念、机理及其对种子发芽能力、抗逆性、种子活力、最终发芽率和田间出苗率、耐贮藏性的影响,从种子渗透调节剂的种类、渗透压、渗透调节温度、渗透调节时间等几个方面说明了种子渗透调节最佳条件的选择,简单介绍了渗透调节技术的研究进展及其在种子处理中的应用状况。 相似文献
5.
人工老化对甜玉米种子活力及抗氧化指标变化分析 总被引：1，自引：0，他引：1
以甜玉米种子为试验材料,研究了人工老化时间对种子活力及抗氧化指标的影响。结果表明,随着老化时间的延长,不同甜玉米种子的发芽势、发芽率都逐渐降低,在种子老化6d后,种子发芽率降低了46%~50%;而种子发芽指数、活力指数变化趋势则因品种而异;在甜玉米种子成熟老化过程中,VE含量先升高再降低,甜玉米种子中的SOD、POD、CAT酶活性均逐渐升高,并且随着老化程度的加剧,不同甜玉米种子中的SOD、CAT酶活性差异不明显,而POD酶活性则和种子发芽率呈负相关。 相似文献
6.
为创造新的小麦种质系,并探讨叠氮化钠对小麦诱变处理的适宜方法,采用了"种子处理同时鼓入空气"、"种子处理不鼓入空气"、"颖苞内滴加"、"生长点注射"、"穗茎注射"5种方法诱变小麦"邯7086".其中"种子处理同时鼓人空气"方法处理的种子出苗率高,后代性状变异类型丰富,变异率高,是适合小麦诱变处理的一种切实可行的好方法.... 相似文献
7.
8.
测定富贵籽种子的特性,种子呈球形,粒径7.544±0.442 mm,百粒重为14.202±0.359 g;采用正交试验设计,研究不同的种子贮藏方式、GA3浓度、浸泡时间的处理对富贵籽种子出苗的影响（主要考查了平均出苗天数、出苗率和出苗指数等指标）。结果表明：种子的贮藏方式是影响的主要因素,其次是GA3处理的浓度和浸泡时间。在该试验条件下,提高富贵籽种子出苗的最佳处理方法为：种子经混沙湿藏90 d,用100 mg/L的GA3溶液,浸泡2 h进行预处理。 相似文献
9.
扑力猛悬浮种衣剂对小麦种子活力和苗期性状的影响 总被引：2，自引：0，他引：2
扑力猛悬浮种衣剂对小麦种子包衣后,小麦种子的发芽率、发芽势、株高和单株鲜重都显著低于对照,田间出苗率和活力指数与对照相比无显著差异。 相似文献
10.
《河南职业技术师范学院学报(职业教育版)》2016,(2)
以法国梧桐(Londinensi planum ligna)种子作为材料,采用发芽率、发芽势、发芽指数等生理指标研究低温处理不同天数对已经经过低温预处理的法国梧桐种子萌发的影响.结果表明:经过低温预处理的法国梧桐种子在室温条件下萌发率较低,发芽率为27%,重复低温(5℃)处理后在室温条件下的萌发率更低,处理1 d的发芽率为14%,处理5 d的发芽率为13%,处理10 d的发芽率仅为8%.同时发芽势、发芽指数在此条件下也相对较低.低温对将要萌发的法国梧桐种子能产生明显的抑制作用. 相似文献
11.
Dong-dong Cao Jin Hu Xin-xian Huang Xian-ju Wang Ya-jing Guan Zhou-fei Wang 《Journal of Zhejiang University. Science. B》2008,9(12):964-968
The changes of kernel nutritive components and seed vigor in F1 seeds of sh
2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series
regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while
starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination,
germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after
pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters
determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between
seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content
and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that
the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing
sugar in sweet corn seeds during seed development stages.
Project supported by the National Natural Science Foundation of China (No. 30370911) and Education Department of Zhejiang
Province, China (No. 20070147) 相似文献
12.
Dong-dong CAO Jin HU Xin-xian HUANG Xian-ju WANG Ya-jing GUAN Zhou-fei WANG 《Journal of Zhejiang University. Science. B》2008,9(12)
The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d aider pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages. 相似文献
13.
采用不同浓度的水杨酸（SA）浸泡玉米,通过测量种子发芽率、发芽势及幼苗的一些形态指标和生理指标,研究SA对玉米种子萌发及幼苗生长的影响．结果表明：SA浸种对玉米种子萌发及幼苗的生长具有显著影响,大致呈低促高抑现象． 相似文献
14.
Kaya M Kaya G Kaya MD Atak M Saglam S Khawar KM Ciftci CY 《Journal of Zhejiang University. Science. B》2008,9(5):371-377
Chickpea is an important food legume crop of Turkey and is largely grown for human consumption on low moisture or salt-affected soils.The objective of the study was to find the effects of NaCl stress at electrical conductivities of 4.5,8.6,12.7 and 16.3 dS/m and seed sizes (7,8 and 9 mm) on germination and early seedling growth of three popular chickpea cultivars (AKN-97,Gokce and Uzunlu-99).Mean frequency of germination,germination time,germination index,root length,shoot length and seedling fresh weight showed seed size-dependent responses of cultivars to salt stress.In general,small seeds germinated and grew more rapidly compared to medium and large seeds of the same cultivars against all levels of salt stress,with the best results in cultivar Uzunlu-99.No effect of NaCl treatments was observed on frequency of germination; however,a drastic decrease in early seedling growth was recorded at increased NaCl concentrations.Regression analysis results showed a significantly positive rela-tionship (P<0.01) between seed size and mean germination time,whereas a significantly negative relationship was recorded between seed size and germination index,root length,shoot length.Moreover,linear regression values apparently confirmed that increased seed size in each cultivar affected decreased germination index,root and shoot lengths with enhanced mean germination time.Thus,it was concluded that the use of small seeds could considerably reduce the production costs of chickpea in salt-affected soils. 相似文献
15.
运用GA、IBA、PP333、S—3307及其不同浓度处理毛叶枣(Zizyphus mauritiana Lam.)的砧木种子。试验结果表明,所有植物生长调节剂处理都比对照(清水处理)能使种子萌发率不同程度地提高,尤以10mg/L S—3307效果最好,种子萌发率高达88.7％。同时,生长调节剂抑制幼苗根长但显著增加了根数。本试验认为在生产上可采用10mg/L S3307或100mg/L IBA浸种处理,以利提高毛叶枣砧木种子萌发率和幼苗健壮生长。 相似文献
16.
Ca62 、Zn^2 及二混合对甜高梁进行浸种处理可促进幼苗生长,增加根长、根数及苗高;提高种子萌发过程中淀粉酶、转化酶的活性,增强呼吸速率,促进萌发,提高出苗率;SOD、POD、CAT活也有增加,提高幼苗对干旱胁迫的抵抗能力。 相似文献
17.
通过土培试验和田间试验,研究了六种不同性质的种衣剂对小麦壮苗和增产的效果,结果表明,营养型和激素型种衣剂对培育小麦壮苗、提高小麦产量都有较好的作用.本文同时对种衣剂的成型原理、作用机理、理化性状及其复制工艺进行了初步探讨. 相似文献
18.
Eva-Guadalupe LIZRRAGA-PAULíN Susana-Patricia MIRANDA-CASTRO Ernesto MORENO-MARTíNEZ Alma-Virginia LARA-SAGAHóN Irineo TORRES-PACHECO 《Journal of Zhejiang University. Science. B》2013,14(2):87-96
Objective:To evaluate the effect of chitosan(CH) and hydrogen peroxide(H2O2) seed coatings and seedling sprinklings on two different maize varieties by measuring their phenology,the H2O2 presence,the catalase(CAT) activity,and the protein quantity.Methods:Seven groups of ten seeds for each maize variety were treated with CH(2%(20 g/L) and 0.2%(2 g/L)) or H2O2(8 mmol/L) by coating,sprinkling,or both.Germination and seedling growth were measured.One month after germination,the presence of H2O2 in seedlings in the coated seed treatments was evaluated.Protein content and CAT activity were determined under all treatments.Results:H2O2 seed coating enhanced the germination rate and increased seedling and stem length in the quality protein maize(QPM) variety.Seedlings had a higher emergence velocity under this treatment in both varieties.CH and H2O2 sprinklings did not have an effect on seedling phenology.Exogenous application of H2O2 promoted an increase of endogenous H2O2.CH and H2O2 seedling sprinkling increased the protein content in both maize varieties,while there was no significant effect on the CAT activity of treated seeds and seedlings.Conclusions:CH and H2O2 enhance some phenological and biochemical features of maize depending on their method of application. 相似文献
19.
为促进农业向精准农业、智慧农业方向发展,针对种业中衡量种子质量的重要指标千粒重,为提高其精确度,提出基于非负矩阵分解与支持向量机的粘连种子分类算法,在利用机器视觉与图像识别等技术进行种子颗粒计数时,解决种子因严重粘连（经图像预处理、形态学操作等仍粘连）使系统出现误判,导致计数结果误差较大的问题。实验以玉米种子为研究对象,研究3种常见粘连类型。采用基于NMF的方法实现种子粘连图像有效特征的提取,再运用SVM构建多分类器,解决种子粘连类型的三分类问题,最后通过实验验证,该方法的分类准确率为98%。 相似文献
20.
Li-qiang Su Jia-guo Li Hua Xue Xiao-feng Wang 《Journal of Zhejiang University. Science. B》2017,18(8):696-706
Coating seeds with water absorbent materials can improve their survival, especially for those planted in drought or barren areas. In this study, effects of five kinds of super absorbent polymers (SAPs) on seed germination and seedling growth of Caragana korshinskii under drought conditions were investigated. Our results showed that SAP coatings could significantly improve the percentage and energy of seed germination, as well as reduce the relative electrical conductivity (REC), proline, malondialdehyde (MDA), H2O2 content, and peroxidase (POD) activity during germination. These results implied that seeds could uptake moisture from SAP coatings to alleviate drought-induced oxidative stress and membrane damage, thus exhibiting a better vigor and germination performance. After coating C. korshinskii seeds with SAPs, more seedlings emerged and grew better. Under the combined influence of the water absorption capacity of SAP and other factors, the efficiencies of five SAP coatings are in the sequence D>E>B>A>C. The function of the SAP coating on promoting seedling survival was confirmed in Mu Us Sandy Land in Ordos, Inner Mongolia Autonomous Region, China. The average seedling number of SAP D-coated seeds increased twofold on that of naked seeds. Our results are expected to be helpful in understanding and utilizing SAP seed coatings in improving plant survival under drought conditions. 相似文献