Subjects: Biology >> Botany >> Applied botany submitted time 2023-12-24 Cooperative journals: 《广西植物》
Abstract： Effects of different nitrogen fertilizer application rates on fruit quality of pitaya under the condition of calcareous soil in karst area were discussed in order to promote the growth, development and quality improvement of pitaya. The ‘Taiwan Dahong’ pitaya in 3-year-old were used as the experiment material. Based on 0.216 kg of phosphorus (P) and 0.324kg of potassium (K), four nitrogen application levels (CK, T1, T2, T3) were setted. 21 fruit quality indexes were determined, and the quality differences of pitaya with different nitrogen application levels (CK,T1,T2,T3) were compared. At the same time, 11 appearance quality indexes were comprehensicely analyzed by principal component analysis. The results were as follows: (1) Compared with the control, nitrogen application could increase the soluble sugar content and soluble solids of fruit content, reduce the protein content and dietary fiber content, and the high nitrogen treatment (T3) was significantly different from other treatments. With the increase of nitrogen application rate, the titratable acid content and vitamin C content of fruit increased first and then decreased, while the solid-acid ratio decreased first and then increased with the increase of nitrogen application rate, and the high nitrogen treatment(T3) was significantly higher than other treatments. High nitrogen level significantly increased the fruit vertical and horizontal diameter, fruit shape index and single fruit weight. (2) Compared with the control, nitrogen application treatment reduced the N content of pitaya fruit and increased the P content, and the N and P contents of each treatment were significantly different. The K content of fruit increased with the increase of nitrogen application rate, and T3 treatment was significantly higher than other treatments. Nitrogen application increased fruit B content and decreased fruit Cu content. The contents of Mn, Fe, Ca and Mg in different treatments were ranked as T3 > T1 > CK > T2. The content of Zn decreased first and then increased with the increase of nitrogen application rate. (3) The principal component comprehensive evaluation score of the high nitrogen level treatment was the highest, indicating that when selecting brown calcareous soil in Guilin karst area to grow pitaya, supplemented by a certain amount of P and K fertilizer, high nitrogen treatment was more conducive to improving the quality of pitaya. In actual production, it is necessary to make appropriate adjustments according to the soil fertility status of the plantation.
Subjects: Biology >> Botany >> Applied botany submitted time 2021-12-19 Cooperative journals: 《广西植物》
Abstract： Different varieties have different resistances. In order to further explore the resistance differences in different varieties of pitaya fruit and provide a reference for further study on breeding of pitaya fruit resistance. Our study using Illumina HiSeq 2000 sequencing platform to sequencing the transcriptome of ‘Putongbairou’ （BR） and ‘Ecuador Yellow’ （EY）. Functional classification and enrichment analysis of differentially expressed genes （DEGs） were performed by reference to GO Ontology, KEGG and others databases. The results were as follows: (1) There were 14 248 DEGs between BR and EY, of which 5 446 genes were up-regulated and 8 802 genes were down-regulated. (2) GO functional analysis showed that these DEGs are mainly involved in enzyme catalytic activity, cell components, metabolic processes, etc. Among them, there were 349 differential genes involved in oxidoreductase activity. (3) KEGG pathway analysis showed that most of the DEGs were enriched in metabolism, biosynthesis, etc. , and 12 key genes such as CYP86 and CER1 involving in Cutin, suberine and wax biosynthesis. We found the expression of DEGs involved in oxidoreductase activity were higher in BR than that in EY, which significantly enriched, indicating that may be differences in growth and cell metabolism between BR and EY. DEGs involved in the biosynthesis of Cutin, suberine and wax biosynthesis were up-regulated in BR. Such genes have higher expression in BR, and significantly enriched, suggesting that BR may be superior drought and disease resistance than EY.
Subjects: Biology >> Botany >> Applied botany submitted time 2020-01-12 Cooperative journals: 《广西植物》
Abstract：晚花杜鹃（late flower Rhododendron ）是一类花期较晚的杜鹃品种，具有较高的观赏价值，被广泛应用于庭院种植和园林绿化。随着旅游以及经济发展的需要，开发和利用晚花杜鹃资源显得非常迫切。自然条件下晚花杜鹃萌发率相对较低，因此为提高晚花杜鹃萌发率，探究不同浓度赤霉素（GA3）处理对五种杜鹃种子萌发的影响。该研究以五种晚花杜鹃（小白杜鹃、大白杜鹃、桃叶杜鹃、长蕊杜鹃和九龙山杜鹃）为实验材料，通过不同浓度（0，300，400，500，600，700 mg·L-1 ）的GA3 对五种晚花杜鹃种子进行24 h 浸种处理，测定其发芽指数、发芽势、发芽率以及成苗率等指标，分别确定五种杜鹃种子萌发的最适GA3浓度，并对相同处理下五种杜鹃种子的萌发率和成苗率进行比较。结果表明：GA3 浸种对五种晚花杜鹃种子萌发具有促进作用，在适当GA3 浓度下五种杜鹃种子的发芽指数、发芽势和发芽率均显著高于对照，萌发时滞、萌发高峰期和持续萌发时间均较对照相对缩短。其中，大白、桃叶和九龙山杜鹃种子在GA3 浓度为600 mg·L-1 处理时各项萌发指标相对较好，长蕊杜鹃以GA3 为700 mg·L-1 浸种处理萌发效果相对较好，小白杜鹃以GA3 浓度为400mg·L-1 和700 mg·L-1 处理最好。因此，在杜鹃的栽培中，可以采用赤霉素GA3 处理法提高种子发芽率，缩短萌发时间
Subjects: Biology >> Botany >> Applied botany submitted time 2019-02-25 Cooperative journals: 《广西植物》
Abstract：随着全球气候变化加重，干旱强度和持续时间逐渐增加，严重影响植物生长和作物产量。喀斯特为典型的干旱和高钙生境，植物叶片富集大量的草酸钙晶体，而该晶体与植物的耐旱性之间的关系并不清楚。该文以喀斯特适生植物堇菜（Viola verecumda）为材料，土壤进行自然干旱，分析堇菜叶片的草酸钙晶体变化特征与水分之间的关系。结果表明，在土壤自然干旱条件下，堇菜主要通过细胞内束缚水的游离，维持细胞内水分平衡；而在干旱后期，叶片通过关闭气孔，将部分自由水转变为束缚水，防止水分流失。此外，草酸钙晶体的数量与束缚水含量具有极其显著的强正相关线性回归关系（r=0.825 3，P<0.000 1），意味着草酸钙晶体担当主要的束缚水物质。因此，堇菜植物在耐旱过程中可能协调草酸钙晶体和气孔的生理行为忍耐干旱胁迫。
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：辣木原产于印度北部喜马拉雅山南麓，是辣木属中利用及研究最多、商业价值最高的品种。大量研究表明，辣木根、树皮、叶、籽等多个部位含有生物活性物质，如黄酮、多糖、生物碱、酚类等。此外，辣木具有抗菌、消炎和促进肠道发育作用，在维持动物个体健康和预防疾病方面有潜在的利用价值。因此，本综述对辣木的营养价值、化学成分、药理特性以及其在抗菌、消炎和畜牧生产中的应用进行总结，旨在为开发辣木提取物作为天然功能性饲料添加剂提供理论基础。
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：辣木是一种有特种经济价值的热带落叶乔木，具有产量高、适应性广、栽培简便、抗逆性强的优势，而且辣木营养价值高，叶片干物质中粗蛋白质含量高达27%，氨基酸组成合理，含有丰富的维生素、矿物元素和不饱和脂肪酸，是一种不可多得的饲料资源。为此，本文就辣木的生物学特性和营养水平进行介绍，并综述其作为饲料资源对动物生长发育、产品品质的影响，以及在动物养殖上的保健作用，旨在为辣木作为新型饲料资源的推广与应用提供参考。
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