Mineral Nutrition Flashcards
Mineral element required by plants in greatest amount is
Nitrogen
Which plant parts require Nitrogen
All plant parts,particularly meristemati cells and metabolically active cells
Phosphorous is absorbed in the form of
H2PO4-
HPO4 2-
What is role of P?
constituent of cell membranes
certain proteins
all nucleotides and nucleic acids
all phosphorylation reactions
Which plant parts require K abundantly?
meristematic tissues
bud
leaves
root tips
Role of K
anion-cation balance
opening and closing of stomata
activation of enzymes
maintaining turgidity of cells
Which plant parts require Ca2+?
meristematic and differentiating tissues
It accumulates in the older leaves
Role of Ca?
formation of mitotic spindle
normal functioning of cell membranes
regulates metabolic activities
Role of Mg2+
activates enzymes of respiration & photosynthesis
involved in synthesis of DNA and RNA
helps to maintain ribosome structure
Which element is a constituent of ring structure of chlorophyll?
Mg2+
Amino acids containing sulphur
methionine and cysteine
Element which is a main constituent of coenzymes,Vitamins(thiamine,biotin,Coenzyme A) and ferredoxin
Sulphur
Which element is required in larger amounts in comparison to other micronutrients?
Fe
Catalase enzyme is activated by?
Fe
Element essential for chlorophyll formation
Fe
Elements required in the splitting of water to liberate oxygen in photosynthesis is?
Mn/Cl
Zn role
activates carboxylases
req. for auxin synthesis
Cu role
Req. for overall metabolism in plants
involved in redox rxns
Boron role
Req. for uptake and utilization of Ca2+ membrane functioning pollen germination carbohydrate translocation cell differentiation and elongation
Molybdenum is a component of?
NITROGENASE and NITRATE REDUCTASE both of which participate in nitrogen metabolism
Cl role
helps maintain anion-cation balance and
determine solute conc.
Deficiency symptoms appear first in older tissues for what sort of elements?
For elements that are actively mobilised within the plants and exported to young developing tissues
eg.N,K,Mg,P
Deficiency symptoms appear first in younger tissues for what sort of elements?
for elements that are relatively immobile and are not transported out of mature organs
eg.S,Ca
What is Chlorosis🍃🌿🍂🍁 and what is its cause?
Loss of chlorophyll leading to yellowing in leaves is chlorosis
Caused due to deficiency of
N,K,Mg,S,Fe,Mn,Zn,Mo
What is necrosis and what is its cause?
death of tissue,particularly leaf tissue
Caused due to deficiency of
Ca,Mg,Cu,K
Deficiency of N,K,S,Mo causes
inhibition of cell division
Deficiency of N,S,Mo causes
Delay in flowering
Excess of Mn induces deficiency of _______ elements.
Fe,Mg and Ca
What is the prominent symptom of manganese toxicity ?
appearance of brown
spots surrounded by chlorotic veins
manganese competes with ___(a)____ and ___(b)___ for uptake and with
____(c)_____ for binding with enzymes
(a) Fe
(b) Mg
(c) Mg
Manganese also inhibit ________
translocation in shoot apex
Ca
Which elements are called FRAMEWORK elements?
C,H,O
Which elements are called CRITICAL elements?
N,P,K
What are the 2 units of nitrogenase enzyme?
Mo-Fe protein
Fe-S protein
Ammonia is converted to Nitrite by
nitrosomonas
nitrococcus
Nitrites are converted to nitrate by
Nitrobacter
nitrocystis
Denitrification(conversion of nitrate to N2) is carried out by
Pseudomonas
Thiobacillus
Rhizobium has relationship with roots of
Alfalfa sweet clover sweet pea lentils garden pea broad bean clover beans
Nodules of some plants export fixed nitrogen as UREIDES . example?
soyabean
2 most important amides ________ and________- found in plants are a structural part of protein
2 most important amides __asparagine______ and__glutamine______- found in plants are a structural part of protein
