"Simulating the process of rhizobia invasion of soybean roots." Chen Cheng said.

【Okay】

In order to study new and improved rhizobia, it is necessary to understand the process from the invasion of soybean roots to the realization of symbiosis in the end.

When the system projects 3D virtual images of soybean rhizomes, Chen Cheng magnifies them to the size of microstructures for easy observation.

Through intuitive simulation, Chen Cheng saw that when leguminous crops germinate and grow root hairs, rhizobia are stimulated and attracted by lectins secreted by root hairs, and a large number of rhizobia gather on the rhizosphere and root surface.

When the root hairs come into contact with rhizobia, the cell wall first softens and the root hairs curl up, then the cell wall becomes invaginated, and the rhizobia invades the root hairs until the cortex of the root.

Subsequently, rhizobia multiply in the cortex and transform into a bacteroid, at which point the root cortex proliferates in large numbers, forming nodule tissue, and finally protruding from the root to form a nodule.

When the profile of the effective nodules is pink, it indicates that the nodules have entered the mature stage, begun to fix nitrogen, and provide nitrogen to the plant.

The whole process system is specially marked, so that Chen Cheng can see clearly.

To say that this special skill of rhizobia nitrogen fixation, Chen Cheng is really envious when he sees it.

Imagine if all crops, such as rice and wheat, could coexist with rhizobia, they would no longer need to be manually applied with so much nitrogen fertilizer, how many resources would be saved and how much cost would be saved for farmers.

As a potential new source of nitrogen fertilizer, biological nitrogen fixation is of great significance for the sustainable development of agriculture. The most environmentally friendly and economical.

Chen Cheng thinks that if the new regulatory mechanism of biological nitrogen fixation of leguminous plants is thoroughly studied, the nitrogen fixation capacity of legumes will be further improved.

In the future, it is possible to use the existing technical base to carry out research on the realization of independent nitrogen fixation in non-leguminous plants such as rice and corn.

If this goal is achieved, it will greatly reduce the use of industrial nitrogen fertilizer, which is of great significance for saving agricultural production costs and ecological environmental protection.

If it were other researchers, it might not be possible in a lifetime.

But for Chen Cheng, who holds the system, this matter will not be too difficult.

Thinking of this, Chen Cheng's thinking stopped at the principle of nitrogen fixation in rhizobia.

What he didn't expect was that rhizobia directly converted N2 into ammonia!

The chemical formula is: 2NO+O2=2NO2

In other words, the nitrogen it needs comes from nitrogen in the air.

And 80% of the composition of the air is N2!

Molybdenum ferroerythroprotein in rhizobia catalyzes the reaction of N2 to nitrogen dioxide. Nitrogen dioxide then reacts with the acidic substances in the rhizobia and is converted into ammonia salts.

Subsequently, ammonia salts are converted into organic chemical amines under a series of hydroxyl slashing hydrolysis in rhizobia, such as carbohydrates, and then a part of the rhizobia impregnated with the epidermis of green plants is released, which are used by green plants.

Finding this key point, Chen Cheng's thinking suddenly opened.

Rhizobia can only parasitize on the rhizome of soybeans, does this limit its content in soybean plants?

If it is modified to survive on the stems and leaves of plants, then the living space of rhizobia will be expanded several times, and its nitrogen fixation will also skyrocket!

Chen Cheng was a little excited, he felt that he had discovered a new world.

Just as he was about to start the experiment, there was a knock on the door outside the lab.

"Is Chen Cheng here?"

It was Zhao Feng's voice.

Chen Cheng hurriedly walked out and closed the door of the inner room.

"Principal Zhao, I'm here."

"I heard from my classmate that you came back, and you didn't answer the phone call, so I came to you in person."

Chen Cheng said: "When I was doing the experiment, I turned off my mobile phone. Principal Zhao, what's the matter with you? ”

"This afternoon, the ribbon was cut in the new laboratory building. I'm here to inform you. ”

"So fast?" Chen Cheng was surprised.

At that time, the plan was to cap the ceiling in two months, and the renovation was completed and delivered in four months, but I didn't expect that now it has only been more than two months, and the experimental building has been completed.

"Is it built?" Chen Cheng asked.

"The exterior decoration is finished, and there are still some soft decorations and water and electricity inside."

"Then why are you in a hurry to cut the ribbon now?" Chen Cheng asked.

Zhao Feng said: "Director Wang Wei arranged it, saying that there are big leaders coming today, and it is just right to cut the ribbon." ”

Chen Cheng nodded.

After all, other Hanxi saved so much money, and he had to buy so much equipment later, although it was for the leader to stand on the platform, but this matter really had to go.

The mouth of the eater is short, and the hand of the man is short.

It's not that he is short of hands, Hanxi Province has given him so many benefits, and he has already obtained "sour hands".

"Good. I went over after lunch. ”

After sending Zhao Feng away, Chen Cheng saw that there was not much time left. So I went to the cafeteria for lunch.

The main reason is that Ding Tao and the others have been arranged to go to the school factory to do quality inspection, and he can't find anyone to bring food.

After one o'clock in the afternoon, Chen Cheng arrived in front of the newly built laboratory building.

I have to say that the urban construction group is really powerful, and a four-story laboratory was completed in more than two months.

Looking at the retro flavor but well-equipped laboratory building, Chen Cheng was very satisfied.

It not only retains the beauty of ancient Chinese architecture, but also takes into account the functionality of modern urban architecture.

After a while, Zhao Feng also arrived with the school leaders.

"How?" Zhao Feng asked as if showing off.

He has a credit for this, in addition to arranging for the school's logistics office to inspect the construction site every day, he has to hold a construction progress coordination meeting once a week.

It is indeed well-intentioned for the construction of the laboratory building.

Of course, this is his most visible political achievement, and it is reasonable for him to be attentive.

Chen Cheng nodded and said, "Thank you President Zhao for your great support." ”

Zhao Feng waved his hand: "The main thing is that you have the ability to win glory for our agricultural university." ”

The makeshift stage has been built, and the etiquette next to it is also in place, just waiting for Wang Wei and them.

In less than ten minutes, two Coasters drove into the square.

The first to come down were the clerks of the Hanxi Provincial Agricultural and Labor Committee, and then Wang Wei.

Zhao Feng took Chen Cheng and hurriedly greeted them.

After Wang Wei got out of the car, he quickly walked to the door of the second car.

Then, Chen Cheng saw a man in a black jacket come out of it, followed by four people younger than him.

He was also wearing a black jacket.

Looking at Wang Wei's respectful attitude, Chen Cheng knew that the comer was extraordinary.

When the man got off the station, Chen Cheng and the others also walked to the front.

"I'll introduce you." Wang Wei pointed at Chen Cheng and said, "This is classmate Chen Cheng." ”

"This is Zhao Feng, vice president of Hanxi Agricultural University."

After finishing speaking, Wang Wei turned to the man and said to Chen Cheng: "This is the leader of Wu Bin of the Ministry of Agricultural Development. ”

Chen Cheng hurriedly stretched out his hand enthusiastically and swallowed his saliva by the way.

It's getting higher and higher.