wiz-icon
MyQuestionIcon
MyQuestionIcon
7
You visited us 7 times! Enjoying our articles? Unlock Full Access!
Question

Appearance of brown spots surrounded by chlorotic veins is a toxicity symptom of

A
Mo
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Mn
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Mg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Zn
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B Mn
Micronutrients are always required in low amounts. Their moderate decrease in the soil causes deficiency symptoms. However, a moderate increase in their concentration can cause toxicity as there is a narrow range of concentration at which the elements are optimum. Any mineral ion concentration in tissues that reduces the dry weight of tissues by about ten percent is considered to be toxic concentration. Appearance of brown spots surrounded by chlorotic veins is a toxicity symptom of Mn. Excess of Mn cause:
  1. Reduction in uptake of Mg and Fe.
  2. Prevention of binding of Mg with enzymes.
  3. Inhibition of Ca translocation to shoot apex.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Deficiency Symptoms of Essential Elements
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon