HORTICULTURE

HORTICULTURE SCIENCE

PLANT DISEASES PATHOGENS THEIR SURVIVAL AND SPREAD

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Plants also need nitrates to make proteins. They obtain these from
A
The air as nitrate ions
B
The soil as nitrate ions
C
The air as nitrogen
D
The soil as nitrogen
Explanation: 

Detailed explanation-1: -Nitrification. Nitrifying bacteria in the soil convert ammonia into nitrite (NO2-) and then into nitrate (NO3-). This process is called nitrification. Compounds such as nitrate, nitrite, ammonia and ammonium can be taken up from soils by plants and then used in the formation of plant and animal proteins.

Detailed explanation-2: -Plants take up nitrate from the soil via the transporter proteins present in the root cell membrane. There are other nitrate transporters that are involved in moving nitrate within plants to different tissues as needed.

Detailed explanation-3: -Nitrate serves plants as a nutrient and is an important growth factor. It is absorbed from the soil through the roots and helps build organic compounds such as proteins and nucleic acids.

Detailed explanation-4: -During nitrification the ammonia in the soils, produced during mineralization, is converted into compounds called nitrites, NO2−, and nitrates, NO3−. Nitrates can be used by plants and animals that consume the plants. Some bacteria in the soil can turn ammonia into nitrites.

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