XI: Chapter 12- Mineral Nutrition Flashcards
Who developed the science of hydroponics?
Julius Van Sachs
What is the concentration of macronutrients required for plant growth?
> 10mMol/kg
Give the examples of beneficial elements for a plant.
Na, Si, Co and Se
In which plant parts is potassium required in abundant quantities?
Buds, tissues, leaves and root tips (meristematic regions)
Which mineral element is the main constituent of biotin and thiamine?
Sulphur
Which microelement is required in maximum quantity?
Iron
Which mineral is a component of catalase enzyme?
Iron
Which elements are required for photolysis of water?
Manganese and chlorine
Which mineral is required for the activation of carboxylase enzyme?
Zinc
Which element is required for the synthesis of auxin?
Zinc
Which elements are required in redox reactions in plants?
Iron and copper
Which element is required for the uptake of calcium in plants?
Boron
Which element is required for pollen germination?
Boron
Which element is required for cell elongation?
Boron
Which element is required for the translocation of carbohydrates?
Boron
WHich element is required for nitrogen metabolism?
Molybdenum
Which element is a part of the enzymes nitrogenase and nitrate reductase?
Molybdenum
Chlorosis is caused by the deficiency of which elements?
N, Fe, Mn, Zn, Mg, Ca, Cu, Cl, S, K
Mottled chlorosis is caused by the deficiency of
N, K, Mo
Premature leaf fall occurs due to the deficiency of
N, P
What is the actual reason for mottle chlorosis?
Development of anthocyanin
Necrosis occurs in plants because of the deficiency of
Ca, Mg, Cu, K
Premature death of plant occurs due to the deficiency of
K
Poorly developed vasculature in plants occurs due to the deficiancy of
P
Loss of apical dominance and appearance of bushy habit in plants occurs due to the deficiency of
K
Cotton rust occurs due to the deficiency of
K
Deficiency of which element can lead to stunted growth
Ca
Curling of younger leaves occurs due to the deficiency of
Ca
Black heart of celery occurs due to the deficiency of
Ca
Marginal curling in leaves occurs due to the deficiency of
Mg
Interveinal chlorosis occurs due to the deficiency of
Mg, Fe, Mn
Sand drown of tobacco occurs due to the deficiency of
Mg
Chlorosis of younger leaves occurs due to the deficiency of
Sulphur
Reduced nodulation in legumes occurs due to the deficiency of
S, B
Tea yellow diseasse occurs due to the deficiency of
Sulphur
Development of an extensive root system is a symptom of deficiency of sulphur. True/false
True
Interveinal chlorosis first in older leaves occurs due to the deficiency of
Mg
Interveinal chlorosis first in younger leaves occurs due to the deficiency of
Iron
Green netting of citrus occurs due to the deficiency of
Fe
Grey specks of oat occur due to the deficiancy of
Mn
Marsh spot disease in pea occurs due to the deficiency of
Mn
Little leaf of brinjal is caused by the deficiency of
Zn
Kharia disease if rice is caused by the deficiency of
Zn
Rosette formation of leaves and leaf malformation occurs due to the deficiency of
Zn
White bud of crucifers is caused due to the deficiency of
Zn
White tip of maize is caused due to the deficiency of
Zn
Dieback disease is caused due to the deficiency of
Cu
Reclamation disease is caused due to the deficiency of
Cu
Blackening of potato tuber is caused due to the deficiency of
Cu
Brown heart of turnip is caused due to the deficiency of
B
Heart rot of sugarbeet is caused due to the deficiency of
B
Hollow stem of cauliflower is caused due to the deficiency of
B
Loosening of inflorescence of cauliflower is caused due to the deficiency of
Mo
Whiptail of cauliflower is caused due to the deficiency of
B
Bronze colour of leaves is caused due to the deficiency of
Cl
Abscission of flowers is caused due to the deficiency of which elements?
Cl, N, S, Mo
Deficiency of N, K and Mg are first seen in which parts of the plant?
Olderleaves
Inhibition of cell division occurs due to the deficiency of which elements?
N, K, S, Mo
Toxic concentration is that concentration of mineral element in plants which reduces the weight of the tissues by
10%
The appearance of brown spots surrounded chlorotic veins in plants signifies
Mn toxicity
Excess of Mn may induce the deficiency of
Mg and Ca
How are elements absorbed in plants in the first phase?
Passively
How are elements absorbed in the second phase in plants?
Actively
Which element is called the most critical element in plants?
Nitrogen
What is diazotrophy?
Biological nitrogen fixation
Does Rhodospirillum fix nitrogen aerobically or anaerobically?
Anaerobically
Does Bacillus fix nitrogen aerobically or anaerobically?
Anaerobically
Does azotobacter fix nitrogen aerobically or anaerobically?
Aerobically
Does beijernickia fix nitrogen aerobically or anaerobically?
Aerobically
Which symbiotic bacteria is found in the roots of Alnus?
Frankia
Which bacteria help in ammonification of atmospheric nitrogen?
Bacillus
Nitrites are formed by which bacteria?
Nitrococcus, nitrosomonas
Nitrates are formed by which bacteria?
Nitrocysits and nitrobacter
Which bacteria cause denitrification?
Thiobacillus and Pseudomonas
What is the role of nitrate reductase?
Conversion of nitrates into ammonia
In transammination, amino group of one amino acid is transfered to
Keto group of another amino acid
Which genes participate in nitrogen fixation?
Nif, nod and fix genes
Which elements are a part of nitrogenase enzyme?
Mo and Fe
Which element is the activator of RUBISCO?
Mg
Which element is the activator of phosphoenol pyruvate carboxylase?
Mg
Which element is the activator of alcohol dehydrogenase?
Zn
Which element helps in maintaining anion-cation balance?
K
Which element is involved in maintaining turgidity of cells?
K
In which form do plants intake iron?
Fe3+
Which elements are essential in the formation of chlorophyll?
Mg and Fe
Which elements are required in photosynthesis and respiration both?
Mg, Fe, Mn
Which elements does Mn compete with for uptake?
Fe and Mg
Which element does Mn compete with for binding with enzyme?
Mg
Toxicity of which element can inhibit calcium translocation in shoot apex?
Mn
How many electrons are utilized in the fixation of one molecule of nitrogen in root nodule of plants?
8
How many ATP are utilized in the fixation of one molecule of nitrogen in root nodule of plants?
16
What does ammonia react with in reductive amination?
Alpha-ketoglutaric acid
Which enzyme catalyses reductive amination?
Glutamate dehydrogenase
Which enzyme catalyses the transamination reaction?
Transaminase
Which two important amides are structural part of proteins?
Aspargine and glutamine
What is nitrogen fixed as in soyabean?
Ureides
Amides are transported via which vascular tissue in plants?
Xylem
Ureids have a high carbon to nitrogen ratio. True/false?
False. Ureids have a high nitrogen to carbon ratio.
