Highlights of Science Journal on April 9, 2021

News April 12, 2021//---A new issue of Science (April 9, 2021) is released this week.

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Science: Determine the time when the ipsilateral visual pathway appears
doi:10.
1126/science.
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In primates, visual connections are bidirectional: each eye sends neural connections to both sides of the brain.
Vigouroux et al.
studied the evolutionary basis of the bilateral visual system.
A closer look at the connections between the retina and the brain of various fish representing the span of evolutionary divergence, and the discovery that contralateral connections seem to be common.
Ipsilateral connections ( ips ilateral connections) form the bilateral visual system on the basis of contralateral connections, which appeared later in the evolutionary process, but appeared before the transition to terrestrial animals.

9.
Science: Explore the brain evolution of the early Homo
doi:10.
1126/science.
aaz0032; doi:10.
1126/science.
abi4661 The

human brain is larger than the great ape brain, and its structure is also different from the great ape brain.
Ponce de León et al.
discussed the origin of the modern human brain structurally.
By comparing the representations of the inner surface fossils of the early Homo from Africa, Georgia and Southeast Asia---endocast, they found that these structural innovations appeared later than the first time in the early Homo.
The time spread out from Africa may have appeared 1.
7 to 1.
5 million years ago.
Modern human-like brain tissue appears in areas of the brain that are thought to be involved in tool manufacturing, social cognition, and language.
Their findings indicate that brain reorganization is not a prerequisite for spreading from Africa, and early Hominis may have spread over long distances more than once.

10.
Science: Chinese scientists revealed that the competitive stigma signal peptide is the key to successful pollination
doi:10.
1126/science.
abc6107

When the pollen grains fall on the pistil of the flower, a complex dance that leads to sexual reproduction begins.
In a new study, Chinese scientists showed some early steps that helped distinguish compatible pollen grains from random dust.
Under normal circumstances, a stigma gatekeeper, the ANJEA-FERONIA receptor kinase complex, senses the signal peptide produced by the stigma and drives the stigma papillae to produce reactive oxygen species.
After pollination, POLLEN COAT PROTEIN B peptides (PCP-B peptides) compete with the signal peptides produced at the stigma to bind to the stigma receptor kinase complex.
Subsequently, the production of reactive oxygen species at the stigma decreased, allowing hydration to be realized and opening the door for pollen germination.
(Bioon.
com)