WPA1 encodes a vWA domain protein that regulates wheat plant architecture

Plant height,spike,leaf,stem and grain morphologies are key components of plant architecture and related to wheat yield.A wheat(Triticum aestivum L.)mutant,wpa1,displaying temperaturedependent pleiotropic developmental anomalies,was isolated.The WPA1 gene,encoding a von Willebrand factor type A(vWA)domain protein,was located on chromosome arm 7DS and isolated by map-based cloning.The functionality of WPA1 was validated by multiple independent EMS-induced mutants and gene editing.Phylogenetic analysis revealed that WPA1 is monocotyledon-specific in higher plants.The identification of WPA1 provides opportunity to study the temperature regulated wheat development and grain yield.

川西地区川主庙剖面泡砂岩中流体运移规律研究

流体的运移方向及规律是研究油气运移方式及路径的重要内容,只有对流体运移方向及规律建立起运移模型,从而更有效指导油气勘探。此次研究区为马林岩向斜北西翼的名山组泡砂岩层,岩性特征为砂岩层与泥岩层交替出现的互层,向斜翼部以砖红色中–厚层砂岩为主,夹薄层泥岩;向斜核部的位置泥岩层以砖红色泥岩为主,夹粉砂岩和细砂岩。由于名山组泡砂岩孔隙流体在向斜内部的运移模式还没有不太清楚,通过对泥岩层裂缝充填物特征研究和元素分析,了解裂缝与流体之间的关系,进行流体运移痕迹研究,得出流体运移期次和运移规律,从而来建立流体在向斜泥岩层中的运移模型。研究表明,该区泥岩层中裂缝整体较发育,流体运移呈现出规律性:向斜翼部地层应力较小,裂缝发育较少,流体做顺层方向运移;向斜中部所受应力较大,裂缝分布呈蜘蛛网状,流体沿着蜘蛛网状通道运移;核部地层应力大且集中,裂缝发育呈十字状,流体沿十字状裂缝通道运移。