男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Innovation

Across China: Scientists unveil how rice adapts to cold, supports 200-year-old evolution theory

Xinhua | Updated: 2025-05-27 13:39
Share
Share - WeChat

BEIJING -- Chinese researchers have discovered molecular evidence supporting a long-debated evolutionary theory, showing that rice plants can pass on cold tolerance to their offspring -- a phenomenon aligned with Lamarckism, the 19th-century idea that acquired traits can be inherited.

The study, led by scientists from the Institute of Genetics and Developmental Biology (IGDB) of the Chinese Academy of Sciences and published in the journal Cell, reveals how epigenetic changes enable rice to adapt to colder climates and preserve this adaptation across generations.

To understand how rice evolved as it spread northward into colder regions, scientists exposed cold-sensitive rice plants to cold stress over multiple generations, selectively breeding those that best withstood the low temperatures. This process produced rice lines with stable, heritable cold tolerance that persisted for at least five generations, even after the cold stress was removed.

The key mechanism involves DNA methylation, a chemical modification that regulates gene activity. Cold stress reduced methylation near the ACT1 gene, which plays a crucial role in cold resistance. Using epigenome editing tools, the researchers confirmed that this epigenetic change directly enhances cold tolerance by increasing ACT1 expression under cold conditions.

Further analysis showed that natural rice varieties in China exhibit a clear epigenetic pattern: over 88 percent of southern rice strains, rarely exposed to low-temperature environments, had high methylation levels near ACT1, making them more cold-sensitive. In contrast, northeastern rice, grown in colder regions, predominantly carried low-methylation versions of the gene, linking this epigenetic trait to environmental adaptation.

Beyond confirming a mechanism for Lamarckian inheritance, the research offers practical applications. The team has proposed a new crop-breeding strategy: exposing plants to stress, identifying beneficial epigenetic changes, and then using precision editing to lock in those traits.

This approach could accelerate the development of climate-resilient crops, addressing food security challenges posed by global warming, said Cao Xiaofeng, a professor at the IGDB.

Peer reviewers praised the study for revealing evolutionary mechanisms beyond traditional Darwinian theory, calling it a significant step in understanding how organisms rapidly adapt to changing environments.

Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 兴业县| 双城市| 蒙自县| 靖西县| 筠连县| 扬中市| 南阳市| 台湾省| 丹巴县| 白河县| 秀山| 黄大仙区| 罗城| 怀安县| 筠连县| 镇赉县| 崇明县| 南陵县| 深水埗区| 海兴县| 景宁| 达日县| 旬阳县| 兴文县| 天台县| 和顺县| 台中市| 惠州市| 名山县| 衡南县| 北宁市| 新竹市| 威海市| 故城县| 伽师县| 大邑县| 扬中市| 镇远县| 杭州市| 临沧市| 遂川县|