搜索结果: 136-150 共查到“国际动态 植物学”相关记录483条 . 查询时间(1.04 秒)
How do sunflowers manage to grow in the desert? Wild sunflowers display extensive variation, both between and within species. Scientists now report that variation is preserved by blocks of "supergenes...
Major group of flowering plants is evolving twice as quickly in temperate zones as in the tropics（图）
Major group flowering plants evolving twice quickly temperate zones tropics
2020/7/10
In a surprise twist, a major group of flowering plants is evolving twice as quickly in temperate zones as in the tropics. The finding runs counter to a long-held hypothesis that tropical regions, home...
植物擦了绿色“防晒霜”
植物 绿色 防晒霜
2020/6/30
美国加州大学河滨分校物理学家Nathaniel M. Gabor领导的一个国际科学家团队，构建了一个模型再现了在许多生物体中观察到的光合作用光收获的一般特征。相关论文近日刊登于《科学》。光收集主要是植物通过蛋白质结合的叶绿素分子收集太阳能。在光合作用中，光能的收集是从吸收阳光开始的。当阳光照射在叶子上时，植物必须保护自己免受突然激增的太阳能的影响。为了应对这些变化，光合作用生物体——从植物到细菌，...
俄罗斯否定叶绿体起源于细菌的假说
俄罗斯 叶绿体 细菌 BMC Bioinformatics
2020/6/19
据俄科学院西伯利亚分院网站报道，该分院克拉斯诺亚尔斯克科学中心的科研团队通过比较植物叶绿体与蓝细菌的DNA全基因组发现，叶绿体DNA内部结构与细菌存在实质性差异，这是科学界首次验证两者基因组存在原则性结构差异，就此推翻了植物叶绿体细胞起源于蓝细胞的假说。相关成果发布在“BMC Bioinformatics”科学期刊上。
一种罕见植物可由蚂蚁授粉（图）
罕见植物 蚂蚁授粉
2020/6/15
很多植物依赖蜜蜂授粉来繁殖，这一过程对保持地球生态至关重要。近期一项新研究发现，澳大利亚一种彩烟木属植物可让蚂蚁代替蜜蜂来授粉。领导该研究的澳大利亚伊迪斯考恩大学博士生尼古拉·德尔内沃说，大自然中由蚂蚁授粉的植物非常罕见，因为蚂蚁身体分泌的液体含有抗菌素，会破坏花粉颗粒从而导致授粉失败。
熊蜂饿了也“催单”——啃咬叶片使植物提前开花（图）
熊蜂 啃咬叶片 植物 提前开花
2020/6/11
熊蜂是群机智的家伙：当蜂巢附近的植物还没有开花、花粉稀少时，工蜂会想办法迫使它们开花。近日，发表在《科学》杂志上的一项研究显示，这些昆虫会刺穿植物的叶子，导致植物的开花时间比正常情况下平均提前30天。熊蜂催花技术的演化过程，以及这些植物通过开花来响应熊蜂叮咬的原因目前仍不清楚。但研究人员表示，在如此为人熟知的生物身上发现一种新行为是非常了不起的。
Study shows that dry air drives overlooked changes in how plants use water（图）
dry air drives overlooked changes plants use water
2020/6/5
Plants take up much of the water that falls to Earth. They use what they need before releasing it through tiny holes on the surfaces of their leaves, just as people release water vapor every time they...
Study shows that dry air drives overlooked changes in how plants use water（图）
dry air drives overlooked changes plants use water
2020/6/12
Plants take up much of the water that falls to Earth. They use what they need before releasing it through tiny holes on the surfaces of their leaves, just as people release water vapor every time they...
Airborne science discovers complex geomorphic controls on Bornean forests（图）
Airborne science complex geomorphic controls Bornean forests
2020/6/5
Tropical forests contain some of the most biodiverse and dynamic ecosystems in the world.The influence of precipitation, temperature, and soils is especially noticeable when comparing the towering tre...
Red tulips, pink magnolias, purple lilacs: How do plants create all that color?（图）
Red tulips pink magnolias purple lilacs plants color
2020/5/22
Spring is in full bloom, from red tulips to pink magnolias to purple lilacs. How do plants create all that color? The hues that attract pollinators and provide beautiful bouquets begin with the format...
Red tulips, pink magnolias, purple lilacs: How do plants create all that color?（图）
Red tulips pink magnolias purple lilacs plants create that color
2020/5/29
Spring is in full bloom, from red tulips to pink magnolias to purple lilacs. How do plants create all that color? The hues that attract pollinators and provide beautiful bouquets begin with the format...
基因重组让植物也能吃肉
基因重组 植物 吃肉 维纳斯捕蝇草
2020/5/18
植物是如何进化出肉食性的？在1960年上映的一部美国恐怖电影——《恐怖小店》里，只需要一滴人血。但在现实生活中，却没有这么简单。现在，一项针对三种密切相关的食肉植物的研究表明，基因的巧妙重组帮助它们进化出捕捉和消化富含蛋白质食物的能力。食肉植物已经进化出许多诱捕猎物的狡猾方法。例如，猪笼草使用富含酶的“陷阱”消化昆虫，而维纳斯捕蝇草、囊泡貉藻和匙叶茅膏菜则移动捕捉猎物。当可怜的猎物被抓住时，匙叶茅...
Bumblebee disease, reproduction shaped by flowering strip plants（图）
Bumblebee disease reproduction shaped flowering strip plants
2020/5/22
Flowering strips -- pollinator-friendly rows of plants that increase foraging habitat for bees -- can help offset pollinator decline but may also bring risks of higher pathogen infection rates for pol...
Bumblebee disease,reproduction shaped by flowering strip plants（图）
Bumblebee disease reproduction shaped flowering strip plants
2020/5/29
Flowering strips -- pollinator-friendly rows of plants that increase foraging habitat for bees -- can help offset pollinator decline but may also bring risks of higher pathogen infection rates for pol...
What limits the ability of plants to draw water from dry soil?（图）
limits ability plants draw water dry soil
2020/5/15
What limits the ability of plants to draw water from dry soil? That's the question California State University, Fullerton plant biologist H. Jochen Schenk and his collaborators addressed in a study su...