24小时热门版块排行榜    

查看: 1701  |  回复: 0

yexuqing

木虫之王 (文学泰斗)

太阳系系主任

[交流] 阴天条件下,信鸽的导航依赖超顺磁性巨噬细胞

Homing pigeon navigation relies on superparamagnetic macrophages under overcast conditions

阴天条件下,信鸽的导航依赖超顺磁性巨噬细胞

▲ 作者:CLIVIA LISOWSKI, MICHAEL QUETTING, DANIELA KLAUS, LISA LAZAREVSKI, LEA SEEP, MAXIMILIAN GERMER, JIAN LI, INGE MüLLER, DANIEL ZUNIGA, AND CHRISTIAN KURTS

▲链接:

https://www.science.org/doi/10.1126/science.ady2486

▲摘要:

鸟类使用多种导航策略,包括地磁场,尤其是在其他线索不可用时(例如阴天或夜间条件下)。有人提出喙中的磁铁矿颗粒、眼中的隐花色素、细胞离子通道的改变以及前庭系统的变化来解释磁感受,但确切的机制仍存在争议。研究者通过物理、形态学、功能性和基因组学分析,鉴定了肝脏中超顺磁性巨噬细胞的存在。

他们发现,在巨噬细胞耗竭后,阴天条件下飞行的鸽子丧失了其通常的方向定位能力。而在晴天可见太阳时,巨噬细胞耗竭的鸽子方向定位能力未受影响,这表明太阳是其主要的定位线索。他们提出,在原鸽的归巢行为中,肝脏中的超顺磁性巨噬细胞是找到地磁方向所必需的。

▲ Abstract:

Birds use a variety of navigational strategies, including the geomagnetic field, especially when other cues are not available, such as under overcast or nocturnal conditions. Magnetite particles in the beak, cryptochromes in the eye, cellular ion-channel alterations, and changes in the vestibular system have been proposed to explain magnetoreception, but the exact mechanisms remain debated. Here, we used physical, morphological, functional, and genomic assays to identify the presence of superparamagnetic macrophages in the liver. We found that after macrophage depletion, pigeons flying under overcast conditions lacked their usual orientation capabilities. Orientation was unimpaired in birds without macrophages when the sun was visible, suggesting that this was their primary cue. We propose that in homing pigeons, superparamagnetic macrophages in the liver are required for finding magnetic direction.
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 yexuqing 的主题更新
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[基金申请] 欢迎发来filecode的Mz6后的代码验证其规律 +55 医学老男孩 2026-08-13 123/6150 2026-08-19 23:44 by stan_et
[基金申请] 今天基金会出结果吗?20260819 +13 kkkl_v 2026-08-19 13/650 2026-08-19 22:37 by 宝贝虫子
[基金申请] 时间戳变了,能看出什么问题? +12 基诺咪客 2026-08-17 16/800 2026-08-19 22:04 by kk 的小木虫
[基金申请] filecode,4个jtjc了 +11 ziyangfang 2026-08-19 13/650 2026-08-19 21:28 by aasahr
[教师之家] 为什么余额宝的年化利率越来越低?主要原因有哪些? +5 瞬息宇宙 2026-08-15 5/250 2026-08-19 20:23 by super2002521
[基金申请] 今天放榜没戏了吧 +4 yuleib84 2026-08-19 5/250 2026-08-19 19:52 by hhs666
[基金申请] filecode=后面第一个是大写字母 +10 wangze12014 2026-08-14 12/600 2026-08-19 16:56 by 苦难博士
[基金申请] 2027广东省杰青 +4 奶牛小黑 2026-08-15 10/500 2026-08-19 11:02 by wanfengnew
[基金申请] 朋友圈看到的 +6 wangzilk 2026-08-18 8/400 2026-08-19 10:55 by Haru815
[基金申请] 快农历七夕节了,轻松一下,男人悄悄话,女施主请不要进来。 +6 Tide man 2026-08-14 7/350 2026-08-19 09:56 by ZJTJZ
[基金申请] 什么时候开奖? +6 CrisMessi 2026-08-18 6/300 2026-08-19 08:06 by Equinoxhua
[基金申请] 重要消息,中午系统在维护 +10 yuleib84 2026-08-18 11/550 2026-08-19 07:30 by 羽毛枫f
[基金申请] 明天放榜? +5 Shxjjxjkx 2026-08-18 5/250 2026-08-18 18:14 by -大大大大大-
[论文投稿] 投稿咨询 +4 wwm09 2026-08-17 6/300 2026-08-18 15:36 by wwm09
[基金申请] 时间戳又变了8-15 +14 archvillain 2026-08-15 26/1300 2026-08-18 13:37 by phantomgost
[基金申请] 今天维护系统维护 祝所有人 高中 +8 gjjjzhong 2026-08-18 9/450 2026-08-18 13:01 by 家与远方
[基金申请] 93BebMhtakh前后11位开头都是大写 +4 且听虎啸 2026-08-17 5/250 2026-08-18 00:49 by 蔡棒棒菂
[基金申请] 感觉是下周放榜了 +6 angus9576 2026-08-17 11/550 2026-08-17 23:57 by angus9576
[精细化工] 招聘 金属平磨液,抛光液研发工程师 +3 小天0311 2026-08-14 3/150 2026-08-16 07:31 by H9PLUS
[基金申请] 各位道友,我要去昆明玩几天,回来见。 +7 Tide man 2026-08-14 8/400 2026-08-15 01:11 by arzu_hma
信息提示
请填处理意见