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研究发现“液态烟雾”能让某些作物变得更强壮和抗病_我的网站

A |     这一发现或多或少是偶然的，当时密苏里大学的Richard Ferrieri教授和同事正在研究烟雾饱和的土壤对植物生长的影响。

B |     United Nations, Oct 12 (UNI) North Korean Ambassador to the UN Kim Song on Wednesday lashed out at the US, arguing it is aggravating tensions on the Korean Peninsula.
Addressing a session of the first committee of the UN General Assembly held in New York on Tuesday (local time), Kim, who serves as the Permanent Representative of the Democratic People's Republic of Korea to the UN, urged the US to refrain from providing a nuclear umbrella and to suspend joint exercises with South Korea.
He claimed that the "stakes are running high" on the Korean Peninsula more than ever before due to the "dangerously growing hostility" and nuclear threat of Washington, Yonhap news agency reported.
"The US is now desperate to spread the disinformation in the international arena aimed at demonizing the government of our republic with an absurdist sophistry that our self defensive capability poses a threat to global peace and security in the region," he said.
He also called on the US to take the lead in nuclear disarmament and to refrain from providing a nuclear umbrella or transferring nuclear technology.
The envoy also took issue with the recent joint exercises between Washington and Seoul, including the Ulchi Freedom Shield exercise in August and maritime exercises involving the nuclear-powered aircraft carrier USS Ronald Reagan last month.
He then defended the North's arms buildup as a basic right stipulated in the U.N. charter and a self-defensive means to counter the "heinous" hostility of the US.
"Under such inevitable circumstances, we are compelled to decide to organize military drills under the simulations of an actual war at different levels in order to check and improve the reliability and combat power of our state war deterrence and send a strong military reaction warning to the enemies," he said.
The comments came as the North has been sharply ratcheting up tensions on the peninsula in recent weeks, staging seven rounds of provocative ballistic missile launches over the past two weeks.
The North also said it staged large-scale air-attack drills on Saturday, involving the simultaneous mobilization of around 150 warplanes "for the first time in history".
UNI ING。在2022年的整个生长季节中，科学家们每周将液态烟加入盆栽向日葵生长的土壤一次。液态烟--作为食品添加剂被广泛销售--基本上只是水和凝结的烟粒，从木材燃烧中获得。在这项研究中，它被用来模拟野火产生的烟雾。研究人员发现，跟生长在普通土壤中的对照组相比，生长在富含碳的烟雾土壤中的向日葵产生了更大、更厚、更绿的叶片。它们的茎也更粗，花的数量是原来的两倍，并且看起来对病虫害的抵抗力更强。

C | 这些品质的产生是由于植物在其细胞壁内产生了更多的被称为木质素的结构性生物聚合物的事实。这样可以使植物变得更强、更结实还更不容易受到伤害。“拥有较高木质素含量的植物更难被咀嚼和消化，就像昆虫以嫩叶为食时一样。

D | 因此，这些植物可以对害虫的攻击有更强的抵抗力，”Ferrieri介绍道，“另外，木质素含量较高的植物不太容易被微小的病原体感染--细胞更难穿透。因此，这些植物的抗病能力更强......由于能在生长过程中创造更强的物理屏障，植物不必通过耗费能量的不同化学制剂的生物合成来消耗那么多能量来保护自己。

E | 因此，最终，这些植物有更多的资源用于它们的繁殖周期--即制造更多的花朵。”Ferrieri的团队现在正计划测试其他作物植物，他们希望液态烟有朝一日能提供一种更环保的常规杀虫剂替代品。

F | 据认为，大豆的反应可能跟向日葵很相似，因为它们拥有类似的血管系统。

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Published on:03:31:23