Wednesday, February 17, 2016

STUDENTS ASSIGNMENT- IN PLANT PHYSIOLOGY -DZ STUDENTS


42 comments:

  1. Dear students,

    Submit your assignment in this box

    ReplyDelete
  2. GYNOSTEGIUM IN FAMILY ASCLEPIADACEA: Anthers are fused with stigmatic lobes,androceium fuse with a female reproductive organ so androceium is directly proportional to gynoceium is said to be gynostegium.

    GYNOSTEGIUM IN FAMILY ORCHIDACEA:In orchidacea family the filaments of the anther and the style of the ovary fuse together and it forms a complex structure called as column or gynostegium.
    SUBMITTED BY:
    A.ANINA,DB:09

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    Replies
    1. Dear Anina,

      Submit your assignment in DB post box. post the same text in the biosystematics post.

      Delete
  3. B.RUTHYANG
    DZ-30
    Q)WHAT ARE WEEDICIDES?GIVE EXAMPLES?
    A)Weedisides are commonly called herbisides.They are chemicals which control weeds to enter the field and compete with thw cropsand hence cause a direct effect on the crop.

    ReplyDelete
    Replies
    1. Dear Ruth,

      Good, Your Assignments -05- for this semester

      Delete
  4. Dz-132539
    What are halophytes and glycophytes?
    Halophytes: These are native to saline soils where they can grow satisfactorily, compete with other species in same habitat and complete life cycle.
    Glycophytes: These are plants which cannot resist salts to the same degree as halophytes and exhibit signs of growth inhibition, leaf discolouration etc;

    ReplyDelete
    Replies
    1. Dear Anvitha,

      Good, Your Assignment marks- 05 for this semester

      Delete
  5. Nitrification: It is the biological oxidation of ammonia to nitrite followed by the oxidation of the nitrite to nitrate.
    Denitrification: It a process in which nitrates in the soil are converted back into nitrogen (N2) to go out into the atmosphere. Bacteria help with this process.
    Ammonification: It is decomposition of dead organic matter with production of ammonia by the action of bacteria.
    Submitted by:
    M.V.N.Sravya, 132515

    ReplyDelete
  6. Question: Define stress physiology? Mention physiological effects of salt?
    Answer: The study of functioning of plants under various environmental stresses or adverse environmental conditions is called as stress physiology.
    salt stress:High concentrations of salts in the cell sap may effect water relations and metabolism of plants. Salt accumulation appears to reduce activities of some enzymes leading to decreased metabolic rate.
    Submitted by: R.V.L Anvitha , 132537

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    Replies
    1. Dear Anvitha,
      Study well, your assigngment marks- 05

      Delete
  7. PHYSIOLOGICAL EFFECTS :
    AUXINS:
    1. CELL ELONGATION: Its stimulates the elongation of cells. They induce growth in excised stem and coleoptiles by promoting cell elongation.
    2. ROOT INITIATION: Auxins like IAA induce the formation of roots on stems cutting at low concentrations.
    3. APICAL DOMINANCE: auxins induces shoot ,apical dominance.Actively
    growing apical buds dominate and inhibit the growth of axillary buds.
    4. PARTHENOCARPY : The ability of the ovary of a flower to develop into fruit without fertilization is reffered as parthenocarpy.
    CYTOKININS:
    1. CELL DIVISION: Induction of cell division is considered as major function of cytokinins.
    2. DELAY IN SENESCENCE : The ageing process in plants is know as senescence.cytokinins delay the process of senescence.
    3. ORGAN FORMATION: Cytokinins in association with auxins,induce differentiation of organs.
    4. OPENING OF STOMATA: Cytokinins increase the potassium ion concentration in guard cells and help in the opening of stomata.

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    Replies
    1. Dear Divya,

      Study well, your assignment marks-05

      Delete
  8. DASARI HARIKA
    DZ-132521
    Sorry mam i have some troble in my mail so i kept ans from my brothes mail.
    W
    Q)WHAT IS TRANSLATION?AND WHERE IT OCCURS?
    A)The transfer of polypeptide chain from mRNA to protiens is called translation.
    It occurs in ribosomes which are present as tiny particles on endoplasmic reticulum if cells.
    This process occurs in 3 stages.They are 1.Initiation 2.Elongation 3.Termination.

    ReplyDelete
    Replies
    1. Dear Harika,

      Good but some clarity in the definition.

      Study well, Your assignments -05

      Delete
  9. 132547
    what is seed certification?
    seed certification is a legally sanctioned system for quality control of seed multiplication and production.

    what is breeders seed?
    A breeders seed is an offspring of nucleus seed.A breeder is a person (qualified plant breeder) or organization who raises plant primary for breeding purpose.

    ReplyDelete
  10. Dear Praveen,

    Study well, Your assignment marks- 04

    ReplyDelete
  11. Symbiotic nitrogen fixation it occurs in plants, the association between legumes and Rizobium bacteria is called symbiotic nitrogen fixation..
    by- pavan kumar-DZ-10

    ReplyDelete
    Replies
    1. Dear Pavan

      Rhizobium, mutual relationship between two living organisms.

      Assignment marks- 04

      Delete
  12. K.RANGANATH
    DZ-09,,,132509
    1)what is FERMENTATION
    Fermentation is a metabolic process that converts sugar to acids,gases(or)alcohol.It occurs in yeast and bacteria.
    2)AEROBIC RESPIRATION
    It is the process most living things undergo to use food energy

    ReplyDelete
    Replies
    1. Dear Ranganath,

      Define Aerobic Respiration in a systematic manner

      Delete
  13. Stratification: seeds many plants do not germinate until they are exposed to chilling temperature of 0-5°c for a few weeks to few months. The low temperature treatment given to the seeds to break their dormancy is called stratification.
    Scarification: The method employed in softening or weakening of hard seed coat is know as scarification. It includes rubbing of seeds on rough surface to reduce thickness of seed coat.

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  14. Stratification: seeds many plants do not germinate until they are exposed to chilling temperature of 0-5°c for a few weeks to few months. The low temperature treatment given to the seeds to break their dormancy is called stratification.
    Scarification: The method employed in softening or weakening of hard seed coat is know as scarification. It includes rubbing of seeds on rough surface to reduce thickness of seed coat.
    E.Mounika
    132542

    ReplyDelete
    Replies
    1. Dear Mounica,

      Study well, your assignment marks-05

      Delete
  15. Q.What are chain termination codon?Give examples?
    A.These are the stop codons which terminates the protein synthesis.
    Ex:UAA,UAG,UGA.
    Dz-132520
    G.B.L.Prasanna

    ReplyDelete
  16. Q.What are chain termination codon?Give examples?
    A.These are the stop codons which terminates the protein synthesis.
    Ex:UAA,UAG,UGA.
    Dz-20
    G.B.L.Prasanna

    ReplyDelete
  17. Q.What are chain termination codon?Give examples?
    A.These are the stop codons which terminates the protein synthesis.
    Ex:UAA,UAG,UGA.
    Dz-132520
    G.B.L.Prasanna

    ReplyDelete
    Replies
    1. Dear Prasanna,

      Study well, your assignment marks-05

      Delete
    2. Mitochondria: It has self replicating DNA.Thus it is capable of producing its own genetic material.Hence called semiautonomous cell organelle
      F1 particle: On the inner folding, cristae numerous stalked structures are present and are called f0-f1 particles . They play imp role in electron transport during ATP synthesis
      Dz-5
      Jayasres

      Delete
    3. Hareen,

      Mitochandria- power house of cell, 70 s ribosomes, circular naked DNA

      your assignment marks-04

      Delete
  18. B.SANJAY,
    DZ;33
    DORMANCY;Inactive nature of seed called dormancy,[Break period between formation and germination of seed even though it is provide with a all favorable conditions.
    phytohormone that promotes the dormancy is GIBBERLINS

    ReplyDelete
    Replies
    1. Dear sanjay,
      Gibberllins

      Your assignment marks- 05

      Delete
  19. Avena curvature Test:The avena seedlings when planted the tip shows curvature.This curvatures of stems were proportional to the amount of growth substance in the agar (Went, 1928). This test was called the avena curvature test.
    Dz-29
    Priyanka

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    Replies
    1. Dear Priyanka,

      Auxins role on growth

      conc. of Auxins

      Your assignment marks-04

      Delete
  20. SHEEBA RANI
    DZ-28
    WHAT IS TRANSCRIPTION?
    Synthesis of m-RNA from DNA by RNA polymerase enzyme.It occurs in nucleus.

    ReplyDelete
    Replies
    1. Dear rani,

      During the process of Protein synthesis -

      your assignment marks-05

      Delete
  21. Deedee Harper
    Dz:12..,132512

    what is leg hemoglobin?Mention its functions.
    To fix nitrogen, legume nodules require a protein
    called leg hemoglobin.
    Under physiological conditions the heme group is synthesized by the bacteroids and the globin by the ribosomes of the infected cells,then heme and globin are assembled in the plant cell cytoplasm.
    Functions:
    It was proposed that the protein carries the oxygen
    required for bacteroid respiration and, consequently, for
    maintaining active nitrogen fixation.

    ReplyDelete
    Replies
    1. Dear Martin,

      Study well. your assignment marks-04

      Delete
  22. 132546
    what is seed dormancy and mention any two physiological factors causes the dormancy?
    The resting period of the seeds where the active growth temporarily suspended.The seeds of such plants are considered to be in a state of dormancy.ABA and physiologically immature embryos are responsible for dormancy.

    what is chilling treatment and where it is used?
    The exposure of the seeds at low temperature 0-5'C to promote the germination capacity.it is used for the seeds of temperate plant eg:- apple,peach which don't germinate soon after their harvest.

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  23. Sai Rohini
    Dz:32
    physiological effects of gebberellin and abscisic acid?
    The dwarf rosette mutant of the Wisconsin Fast Plant is characterized by a single gene
    mutation which, in the homozygous condition ros/ros, results in 4 to 10 times less gibberellin in the tissues.the mutant's leaves lie flat aganist the soil in what is called a rosette habit.
    . experiment must provide treatment controls.
    . must start enough seeds for controls and all experiments.
    abscisic acid:
    abscisic acid slows seed germination and improves wheat's tolerance to cold and drought.
    .The plant hormone abscisic acid (ABA) regulates drought stress responses by mediating stomatal closure, thereby reducing transpirational water loss.

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  24. Dear Rohini,

    Gibberlins- Elongation of stems, flowering, reduce dormancy, parthenocarpy

    ABA- promotes dormancy, stress, anti transparent, senescence.

    Your assignment marks- 04

    ReplyDelete