Results 31 to 40 of about 48,776 (135)
New Phytologist, Volume 247, Issue 6, Page 2678-2696, September 2025.Summary Many plants reproduce asexually by generating clonal progeny from vegetative tissues, a process known as vegetative reproduction. This reproduction mode contrasts with sexual reproduction, which enhances genetic diversity. The bryophyte Marchantia polymorpha L.
Yuuki Sakai +6 more
wiley +1 more source
PLANTS, PEOPLE, PLANET, Volume 7, Issue 2, Page 367-381, March 2025.Parasitic plants that deprive crops of water and nutrients are an increasingly concerning food security issue, affecting the livelihood of millions of subsistence, small‐ and mid‐scale farmers. An in‐depth understanding of parasite–host interactions is required to develop species‐specific and ecologically sustainable parasite management methods.
Hildah K. Kithinji +4 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2002 从陆西凹陷的实际资料出发,分析了裂缝在油气勘探中的作用及不同类型裂缝的特征,研究了影响构造裂缝发育的因素,认为构造裂缝的发育受构造部位、孔隙度、断层等多种因素的影响,探讨了裂缝发育程度与相关影响因素之间的定量关系,给出了拟合求曲率的方法、与最近断层距离的计算方法,建立了裂缝密度的定量化预测方法--拟合曲率综合预测裂缝方法和相应的评价标准,并对陆西凹陷的裂缝分布进行预测.
WANGXue-jun(王学军) +5 more
doaj +1 more source
New Phytologist, Volume 245, Issue 1, Page 318-331, January 2025.Summary Drought predisposes forest trees to bark beetle‐induced mortality, but the physiological mechanisms remain unclear. While drought‐induced water and carbon limitations have been implicated in defensive failure and tree susceptibility, evidence demonstrating how these factors interact is scarce.
Shealyn C. Malone +8 more
wiley +1 more source
, 2018 认识双重多孔介质中油水两相微观渗流机制是回答形成什么类型的裂隙网络可提高油藏采收率的关键.微裂隙的分布可以提高多孔介质的绝对渗透率,但对于基质孔隙中的流体介质,微裂隙的存在会引起多孔介质中局部流体压力和流场的变化,导致局部流动以微裂隙流动为主,甚至出现窜流现象,降低驱油效率.本文基于孔与裂隙双重网络模型,在网络进口设定两条平行等长且具有一定间隔的微裂隙,分析微裂隙的相对间隔(微裂隙之间距离/喉道长度)和微裂隙相对长度(微裂隙长度/喉道长度)对于微观渗流特征的影响.结果表明:随微裂隙相对长度的增加 ...
刘海娇, 鲁晓兵, 张旭辉
core +2 more sources
Dizhen xuebao, 2018 本文收集了广西龙滩水库地震监测台网2006年9月至2016年12月精定位后的3 382次ML≥0地震的数字波形资料，采用二维衰减成像技术获得了龙滩水库库区的QS二维分布图像。结果显示：龙滩水库库区QS的横向不均匀变化明显，QS低值区围绕着库区近似呈环形分布；在QS低值分布区附近，大多为河流与断裂带的交汇处；QS低值分布主要对应于透水性较强的岩性地区。以上现象表明QS低值分布受水、断裂、岩性等3种因素的影响，由此初步推断库水可能沿着断裂上的岩石破碎带及节理、裂隙发育地区和具有较强透水性岩层区域向下渗透 ...
Qingdong Ye +5 more
doaj +1 more source
New Phytologist, Volume 242, Issue 1, Page 49-60, April 2024.Summary Tree stem methane emissions are important components of lowland forest methane budgets. The potential for species‐specific behaviour among co‐occurring lowland trees with contrasting bark characteristics has not been investigated. We compare bark‐mediated methane transport in two common lowland species of contrasting bark characteristics ...
Luke C. Jeffrey +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2016 通过对湖北通城花岗岩崩岗区发育典型的各层次土体（淋溶层、淀积层、过渡层、母质层）进行干湿循环试验，分析干湿交替次数对各层次土体裂隙发育、崩解性、抗剪强度的影响。结果表明，在干湿循环影响下，土体产生并逐渐发育裂隙，在第2次循环后，土体产生主要裂隙，裂隙比显著增加，此后循环发育出细小裂隙。4次交替后4个层次土体的裂隙比表现为淀积层＞淋溶层＞过渡层＞母质层。随着干湿循环次数的增加，裂隙发育，各层次土体崩解性不断增加，淋溶层和淀积层崩解缓慢，而过渡层和母质层能够在极短时间内完全崩解；随着干湿循环次数的增加 ...
刘昌鑫 +4 more
doaj
Functional traits of fossil plants
New Phytologist, Volume 242, Issue 2, Page 392-423, April 2024.Summary A minuscule fraction of the Earth's paleobiological diversity is preserved in the geological record as fossils. What plant remnants have withstood taphonomic filtering, fragmentation, and alteration in their journey to become part of the fossil record provide unique information on how plants functioned in paleo‐ecosystems through their traits ...
Jennifer C. McElwain +14 more
wiley +1 more source
Shuitu Baochi Xuebao目的揭示界面粗糙度、颗粒级配及温度与厚度耦合作用对土体干缩裂隙发育的主控机制与相对重要性，为防范土体防渗失效与力学失稳等工程隐患提供理论依据。方法选取桂林青狮潭水库库泥为试验对象，设计并开展涵盖不同颗粒级配（内在组分）、底部界面粗糙度（边界条件）及干燥温度与土层初始厚度（环境与几何条件）的系列室内干燥模型试验。利用高精度成像设备记录土体水分蒸发与裂隙演化全过程，结合数字图像处理技术对裂隙网络进行二值化与骨架化处理，定量提取裂隙率、裂隙平均宽度及分形维数等特征参数 ...
李善梅 +4 more
doaj +2 more sources