The nodule formation involves many steps and a sequence of multiple interactions between Rhizobium and the roots of the host plant. The nodule formation steps are:
● Firstly, the Rhizobia multiply and colonise the surroundings of roots and epidermal and root hair cells get attached to it. The bacteria invade when the root-hair curls.
● The bacteria are carried into the cortex of the root when an infection thread is produced, where the nodule formation in the cortex of the root is initiated.
● From the thread, the bacteria are released into the cells which lead to the differentiation of specialized cells for nitrogen fixation.
● A direct vascular connection is formed with the host with the help of nodules which help in the exchange of nutrients.
Answered by Pragya Singh | 1 year agoIn the mineral nutrition studies using hydroponics why is the purification of water and nutrient salts plays important role?
Which of the following statements are true? If false, correct them.
i. Boron deficiency leads to stout axis.
ii. Cell needs every mineral element that is present in it.
iii. Nitrogen is highly immobile in the plants in the form of nutrient element.
iv. The micronutrients are required only in trace quantities so it is very easy to establish their essentiality.
In what conditions atmospheric nitrogen can be fixed by Rhizobium and explain their role in Nitrogen-fixation?
Why is that in certain plants deficiency symptoms appear first in younger parts of the plant, while in other they do so in mature organs?