Evaluating the role of seed priming in improving drought tolerance of pigmented and non‐pigmented rice          下载免费PDF全文

M. Hussain  M. Farooq  D.‐J. Lee 《Journal of Agronomy and Crop Science》2017,203(4):269-276

This study was conducted to evaluate the influence of seed priming on drought tolerance of pigmented and non‐pigmented rice. Seeds of pigmented (cv. Heug Jinju Byeo) and non‐pigmented (cv. Anjoong) rice were soaked in water (hydropriming) or solution of CaCl₂ (osmopriming). Seeds were sown in soil‐filled pots retained at 70 (well‐watered) and 35% (drought) water‐holding capacity. Drought stress caused erratic and poor stand establishment and decreased the growth of both rice types. More decrease in plant height and leaf area under drought stress was noted in pigmented rice, whereas decrease in root length and seedling dry weight, under drought, was more obvious in non‐pigmented rice. Pigmented rice maintained more tissue water and photosynthesis and had more polyphenols, flavonoids and antioxidant activity than non‐pigmented rice. Seed priming was effective in improving stand establishment, growth, polyphenols, flavonoids and antioxidant activity; however, extent of improvement was more in pigmented rice under drought. In conclusion, drought caused erratic germination and suppressed plant growth in both rice types. However, pigmented rice had better drought tolerance owing to uniform emergence, and better physiological and morphological plasticity. Seed priming was quite helpful in improving the performance of both rice types under drought and well‐watered conditions.  相似文献   

铜仁烤烟单叶重现状与提升烟叶质量对策     

马健 《耕作与栽培》2016,(3):70-71

根据铜仁烤烟单叶重的调查数据，认真梳理了铜仁烤烟单叶重的现状，分析了铜仁烤烟单叶重存在的问题，从烟叶收购政策和烟叶生产技术两个方面有针对性的提出提升铜仁烟叶质量的对策，为铜仁烤烟产业的持续健康发展提供理论指导。  相似文献   

黔南州核桃优树叶片营养元素和果实品质相关分析     

徐润  田华林  杜洪业  王玉奇  张季 《四川林业科技》2014,(3):45-47

为了分析叶片营养元素对黔南州核桃优树坚果品质的影响,通过方差分析和相关分析研究了叶片营养元素与坚果品质之间的相关关系。结果表明:不同品种的核桃优树单株的坚果品质指标间存在显著差异;叶片钙、铜和锰显著影响核桃坚果品质。可以通过核桃叶片营养元素的诊断来提高坚果品质。  相似文献   

Sugar Starvation Enhances Leaf Senescence and Genes Involved in Sugar Signaling Pathways Regulate Early Leaf Senescence in Mutant Rice     

Zhaowei Li  Qian Zhao  Fangmin Cheng 《水稻科学》2020,27(3):201-214

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核桃黑斑病综合防治技术     

李新志 《陕西林业科技》2014,(6):80-81

通过对核桃黑斑病发病侵染规律及原因分析,采取加强水肥土管理,合理修剪,减少密蔽,改善通风透光条件;谨防蛀果害虫;越冬管理;药剂防治的综合措施防治,可有效控制核桃黑斑病的发生危害。  相似文献   

‘品丽珠’葡萄不同营养系酚类物质差异分析     

史红梅  张正文  王哲  韩晓梅  王咏梅  任凤山  宫磊 《园艺学报》2020,47(8):1541-1551

筛选山东蓬莱产区酿酒葡萄‘品丽珠’黄烷醇、花色素苷含量较高的优良营养系，以期为发挥其酿酒性能提供理论依据。以蓬莱产区品丽珠母本及3个芽变营养系（214、327、623）为试材，采用分光光度计法分析葡萄果皮和种子中总酚、总单宁、总花色素含量，利用高效液相色谱法分析酚酸类、黄酮醇类、黄烷醇类、花色苷单体及白藜芦醇含量。研究结果表明，黄烷醇是种子和果皮中主要的单体酚，其中儿茶素含量最高；二甲花翠素葡萄糖苷是果皮中主要的花色苷。在相同的栽培管理条件和自然条件下，品丽珠不同营养系间的酚类物质差异较明显，相同营养系不同年份间也有显著差异。其中营养系623果皮和种子的总酚、种子的单宁和黄烷醇以及果皮和种子中的酚酸类、单体花色苷含量显著高于其他营养系和母本。  相似文献   

ghr-miR160, a Class of Gossypium hirsutum L. MicroRNA,Negatively Regulates the Progress of Leaf Senescence     

Duan Shan  Dou Lingling  Cheng Shuaishuai  Guo Yaning  Pang Chaoyou  Ma Qifeng  Wei Hengling  Fan Shu  Wang Hantao  Yu Shuxun 《棉花学报》2018,30(2):111-118

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Effects of the severity and timing of basal leaf removal on the amino acids profiles of Sauvignon Blanc grapes and wines     

Xiao-feng YUE  Yan-lun JU  Zi-zhu TANG  Ya-meng ZHAO  Xu-liang JIAO  Zhen-wen ZHANG 《农业科学学报》2019,18(9):2052-2062

The effects of the severity and timing of leaf removal(LR) on the amino acids of Sauvignon Blanc grapes and wines were studied during the 2017 growing season. High-performance liquid chromatography(HPLC) was used to analyze the amino acids profiles of grape berries and wines. The basal leaves were removed at three time points(40, 56 and 72 days after flowering, named LR40, LR56 and LR72, respectively) at two severity levels(one at which the first, third, and fifth basal leaves of each shoot were removed(50% level); and another at which the first six basal leaves were removed(100% level)). The results showed that leaf removal had little impact on total soluble solids(°Brix), titratable acidity, pH or berry weight. The LR72-50% treated grapes had higher berry weight, titratable acidity and °Brix than those of the other treatments. The highest concentrations of total amino acids and of total amino acids except proline were detected in LR72-50% treated grapes(2 952.58 and 2 764.36 mg L~(-1), respectively); the lowest were detected in LR72-100% treated grapes(2 172.82 and 2 038.71 mg L~(-1), respectively). LR72-50% treatment significantly promoted the synthesis of aspartic acid, serine, arginine, alanine, aminobutyric acid and proline at both severity levels for grapes, the concentrations of all of these amino acids were increased relative to the control concentrations. The LR72-50%, LR40-100% and LR72-100% treated wines had higher total amino acids concentrations and higher concentrations of some individual amino acids, such as arginine, alanine and serine, than did the control wines. Of all the amino acids studied, glycine, tyrosine, cysteine, methionine and lysine were not significantly influenced by the timing or severity basal defoliation in grapes and wines. The present study reveals the effects of the timing and severity of leaf removal on the amino acids profiles of grapes and wines.  相似文献   

42.4%唑醚·氟酰胺悬浮剂对番茄叶霉病的防效     

赵建江  王文桥  马志强  孟润杰  毕秋艳  韩秀英 《安徽农业科学》2016,(7):168-169

[目的]探讨42.4%唑醚·氟酰胺悬浮剂对番茄叶霉病的田间防治效果。[方法]以10%苯醚甲环唑水分散粒剂和70%甲基硫菌灵可湿性粉剂为对照药剂,采用小区试验研究42.4%唑醚·氟酰胺悬浮剂对番茄叶霉病的防治效果。[结果]42.4%唑醚·氟酰胺悬浮剂在剂量为150.0~225.0 g a.i./hm2时,对番茄叶霉病的防治效果为83.37%~91.63%,与10%苯醚甲环唑水分散粒剂120.0g a.i./hm~2对番茄叶霉病的防治效果无显著差异,但显著高于70%甲基硫菌灵可湿性粉剂562.5 g a.i./hm~2的防治效果。[结论]42.4%唑醚·氟酰胺悬浮剂可广泛用于番茄叶霉病的防治。  相似文献   

大蒜素对番茄叶霉菌不同生理小种的抑制作用     

薛东齐  许向阳  姜景彬  王窦逗  李景富 《河南农业科学》2016,(2):71-76

研究大蒜素对番茄生产上叶霉菌主流生理小种1.2.3.4以及2014年新发现生理小种2.5、2.4.5和1.2.3.4.9的抑制作用,为开发安全、高效的植物源农药奠定基础。首先制备大蒜素抽提母液,采用定硫法对其中的大蒜素进行定量测定,发现当溶液中滴加4 m L浓硝酸、溶液p H值为2.0时能够更为准确地测得大蒜素的含量,试验测得大蒜素含量为0.52%。在此基础上,进行了大蒜素对4个叶霉菌生理小种菌丝生长、孢子萌发的抑制试验,离体叶片上的病害预防试验以及苗期药效试验。结果表明,当大蒜素剂量25μL/m L时,其对叶霉菌生理小种菌丝生长的抑制活性较高,其中对1.2.3.4的抑制率最高,对1.2.3.4.9的抑制率最低,对其他2个生理小种的抑制率差异不显著。当大蒜素剂量7.5μL/m L时,其对4个生理小种孢子萌发的抑制效应存在差异,其中对1.2.3.4.9的孢子萌发抑制率最低,对1.2.3.4的孢子萌发抑制率最高。当大蒜素剂量为125μL/m L时,其对叶霉菌4个生理小种在离体叶片上的预防效果均超过95%。苗期药效试验表明,在相等剂量下,大蒜素对叶霉菌的防治效果高于多菌灵和甲基托布津,说明大蒜素是一种可以替代化学药剂防治叶霉病的有效抑菌物质。  相似文献