Timing of organogenesis underscores the evolution of neonatal life histories and powered flight in bats
Timing of organogenesis underscores the evolution of neonatal life histories and powered flight in bats
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器官发生的时间强调了蝙蝠新生儿生命史和动力飞行的进化
DOI：
10.1098/rspb.2022.1928
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Koyabu Daisuke
中科院分区：
文献类型：
--
作者：
Nojiri Taro;Werneburg Ingmar;Tu Vuong Tan;Fukui Dai;Takechi Masaki;Iseki Sachiko;Furutera Toshiko;Koyabu Daisuke
蝙蝠经历了脊椎动物历史上最激烈的肢体创新之一，与动力飞行的进化有关。蝙蝠肢体器官发生的遗传基础的知识有所增加，但很少有记录关于蝙蝠和其他脊椎动物的肢体器官发生之间的差异。我们进行了胚胎学比较的肢体器官发生的时间表在24个蝙蝠物种和72个非蝙蝠蝙蝠。在蝙蝠中，前肢器官发生的时间已经大大延长，前肢嵴的出现时间已经明显加快，而手指和爪发育的首次出现时间已经延迟，促进了手的扩大。此外，我们还发现，与其他胎盘动物相比，蝙蝠后肢的发育早于前肢。蝙蝠新生儿出生后不久就能用发育良好的脚不断地附着在母体或栖息地基质上。我们认为，这种独特的生活史的新生儿，这可能与动力飞行共同进化，推动了后肢和早熟的脚的加速发展。
Bats have undergone one of the most drastic limb innovations in vertebrate history, associated with the evolution of powered flight. Knowledge of the genetic basis of limb organogenesis in bats has increased but little has been documented regarding the differences between limb organogenesis in bats and that of other vertebrates. We conducted embryological comparisons of the timelines of limb organogenesis in 24 bat species and 72 non-bat amniotes. In bats, the time invested for forelimb organogenesis has been considerably extended and the appearance timing of the forelimb ridge has been significantly accelerated, whereas the timing of the finger and first appearance of the claw development has been delayed, facilitating the enlargement of the manus. Furthermore, we discovered that bats initiate the development of their hindlimbs earlier than their forelimbs compared with other placentals. Bat neonates are known to be able to cling continuously with their well-developed foot to the maternal bodies or habitat substrates soon after birth. We suggest that this unique life history of neonates, which possibly coevolved with powered flight, has driven the accelerated development of the hindlimb and precocious foot.
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