5种生物制剂对马铃薯种薯萌芽、极端天气下植株生长和产量性状的影响

旨在满足马铃薯生产中茬口衔接、机械化生产技术应用、不利气候下稳产等对马铃薯出苗早、齐、壮的需求,以‘费乌瑞它’为供试品种,用基于有益活菌或工程菌提取物的5种生物制剂进行种薯处理,对多重性状进行了对比分析。5种生物制剂较常规化学制剂,均能够不同程度地促进种薯萌芽和芽根同生,出苗期提前2~7天,播种后49天的出苗率提高3.33%~17.78%。其中,表现最好的为酵母核苷酸衍生物和VDAL,种薯萌发和生根均显著高于对照。霜冻后,生物剂拌种处理在恢复前期促进植株生长,由此促进恢复后期的块茎发育,较常规化学处理增产8.39%~24.03%,体现了不同程度的保产效果。多马道黑、酵母核苷酸衍生物、根肽和VDAL体现出较好的保产效果,可作为种薯处理剂投入马铃薯生产。     

攀枝花芒果幼果黑心病与土壤理化性状相关性分析

为明确芒果幼果黑心病发生与土壤理化性状的关系,比较黑心和正常幼果矿质营养含量差异,调查幼果黑心病果园土壤pH值和养分丰缺情况,并采用相关分析、逐步回归分析和通径分析方法,对发病果园的土壤pH值、土壤养分和幼果黑心病率进行统计分析。结果表明:黑心病果的矿质养分氮、钾、磷、镁和锌含量均显著高于正常果,其他矿质元素含量差异不显著;不同黑心病果园土壤pH值、养分的变异系数和丰缺差异较大,近半数果园土壤pH值不适宜芒果生长,土壤有机质严重偏低、交换性镁和有效铁含量偏高;幼果黑心病率与土壤pH值和有效硼显著负相关,与土壤碱解氮和有机质分别达显著和极显著正相关,与其他土壤养分差异不显著,筛选出pH值(x_1)、有机质(x_2)、交换性镁(x_7)及有效硼(x_(13)),对幼果黑心病率(y)的最优回归方程达到极显著水平;土壤pH值、交换性镁和有效硼对幼果黑心病率影响主要由其直接作用决定,有机质对幼果黑心病率的影响主要由其直接作用和通过pH值间接作用决定。芒果园的土壤酸碱和个别养分丰缺导致幼果矿质元素含量失衡,进而引起幼果黑心病发生,建议通过改良种植土壤和幼果期叶面喷施硼肥等措施防治该病发生。     

立体绿化集成技术配套产品开发利用研究进展

当前立体绿化在国内多个大中城市中得到了蓬勃发展,促进了相关配套产品的研发和推广应用,同时新型的配套产品又推动了立体绿化的快速发展。本文对华南地区立体绿化基质产品、蓄水种植容器、植被毯、绿墙、生态植被砖等相关配套产品的研发及应用情况展开综述,旨在为今后能更有效地推广立体绿化集成技术及相关产品提供参考。     

甘蓝型油菜种子萌发期耐铝毒特性综合评价及其种质筛选

种子萌发是油菜植株形态建成的重要阶段,铝毒是酸性土壤中影响其种子萌发的主要因素之一,因此筛选出种子萌发过程中耐铝毒种质对油菜生产及研究具有重要意义。本研究利用5份甘蓝型油菜品种(系)筛选出油菜萌发期耐铝毒种质资源处理的适宜胁迫浓度为90μg mL~(-1)。并以该浓度处理148份甘蓝型油菜品种(系)种子,于萌发期测定其发芽势、发芽率、鲜重、干重、根长和芽长等指标,通过铝毒胁迫耐性综合评价值(A值)、平均隶属函数值(ASF值)、对铝毒加权耐性系数(WAC值)、相关性、频数、主成分、灰色关联度、聚类和逐步回归分析等鉴定萌发期耐铝性,建立萌发期对铝毒耐性综合评价模型并筛选出适宜的评价鉴定指标。结果表明, 148份甘蓝型油菜的萌发期各指标在品种(系)间存在显著差异;筛选出萌发期耐铝毒甘蓝型油菜品种(系) 01188、WH-20、A109、甲预31棚等。根据灰色关联度及回归分析结果认为,在油菜萌发期测定其根长、芽长、鲜重、发芽率和发芽势,通过回归方程估算其A值,可以初步判断甘蓝型油菜种质的耐铝毒特性。     

转基因抗虫棉中棉所76高效制种技术规程

总结了优质抗虫棉中棉所76高效制种技术，包括：制种田的选择、前期准备、亲本种植与管理、制种程序及注意事项等关键技术。     

Dietary protein requirement for juvenile mandarin fish,Siniperca scherzeri

An 8‐week feeding trial was conducted to investigate the dietary protein requirement of juvenile mandarin fish, Siniperca scherzeri, a demersal freshwater piscivore with high commercial value in East Asia. Five isolipidic (100 g/kg) and isoenergetic (20 MJ/kg) practical diets were formulated to contain graded levels of 450, 500, 550, 600, and 650 g/kg crude protein, using mackerel fishmeal as the sole source of protein. Each of the five test diets was fed to visual satiety to triplicate groups of fish (initial mean body weight ± SE; 20.1 ± 0.2 g) reared in a recirculating freshwater system over the experimental period. Fish growth performance in terms of weight gain tended to improve with increasing dietary protein level, and the highest values were observed in those fish fed the 600–650 g/kg diets. Feed intake significantly declined as the protein content of the diet increased. Feed efficiency and protein retention tended to increase with increasing dietary protein levels, from 450 to 600 g/kg, and then declined when dietary protein content further increased to 650 g/kg. A similar trend was also found for the protein efficiency ratio, although the observed changes did not reach statistical significance. Whole‐body composition and plasma biochemical parameters were not significantly affected by the dietary protein content. Based on these findings and a broken‐line model of growth, 614.4 g/kg seems to be the proper amount of protein in a practical diet for >20 g mandarin fish.     

Cellular Localization of Rice SUMO/SUMO Conjugates and in vitro Sumoylation Using Rice Components

正Many proteins are regulated by post-translational modifications,such as the reversible covalent attachment of ubiquitin and ubiquitin-like proteins in eukaryotes(Kerscher et al, 2006). Post-translational modification of proteins by the SUMO protein family is involved in diverse cellular processes, including development, hormonal responses, and biotic and abiotic stress signaling(Park et al, 2011). SUMO modification can modulate protein-protein interactions, intracellular localization or the activities of the protein(Gareau and Lima, 2010).