Cross Pollination (Allogamy, Xenogamy):
Cross Pollination includes the transfer of pollen grains from the flower of one plant to the stigma of the flower of the other plant. It is also termed as Xenogamy. (Gk. Xenos = Strange and gamos = marriage) or allogamy (gk, allos = other and gamos = marriage. The major floral characteristics that facilitate cross pollination are:i) Herkogamy:
Flowers are bisexual however the necessary organs, the stigmas and stamens, are arranged in the flower, in such a manner that self pollination becomes mechanically not possible. Example: Hibiscus sps, Gloriosa superba, and so on.
Hibiscus: The stigmas project far over the stamens.
Gloriosa superba: The style is reflexes away from stamens.ii) Dichogamy:
The Pollen and stigma of flower mature at various times to evade self-pollination. It is of two kinds:
a. Protography:
Gynoecium matures previously than androecium example: Aristolochia and so on.
b. Protandry:
Androecium matures and drop pollen gynoecium example: maize.iii) Self-incompatibility:
In certain plants, whenever the mature pollen fall on the receptive stigma of similar flower, it fails to bring around self pollination. This is termed as self incompatibility. Beneath such circumstances, the cross pollination is the only choice.iv) Male sterility:
The pollen grains of certain plants are not functional. These plants set seeds just after crossing pollination.v) Dioecism:
The Cross pollination always takes place whenever the plants are unisexual and dioecious that is, female and male flowers take place on separate plants. Example: Papaya, certain cucurbits and so on.vi) Heterostyly:
The flowers of certain plants have distinct lengths of stamens and styles therefore that self pollination is impossible example: Linum, Primula, and so on.
Latest technology based Biology Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Pollination homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Pollination, project ideas and tutorials. We provide email based Pollination homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Pollination. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Biology homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Pollination. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
tutorsglobe.com oxygen molecule assignment help-homework help by online molecular orbital energy level diagrams tutors
introduction to physical chemistry tutorial all along with the key concepts of where is physical chemistry used, industries where physical chemistry is used and importance of chemistry in everyday life
tutorsglobe.com colour television assignment help-homework help by online tv principle tutors
Transport system in plants tutorial all along with the key concepts of Requirement for Transport System in Plants and Animals, Mechanisms for Movement of Molecules, Transport of Materials in Plants
concept of base number conversion- assignment help and homework help along with the key concepts of big mod, big integer, carmichael number, catalan formula, counting combinations, exponentiation, factorial, fibonacci, greatest common divisor and lowest common multiple.
www.tutorsglobe.com offers General Principles of Process Costing homework help, assignment help, case study, writing homework help, online tutoring assistance by accounting tutors.
tutorsglobe.com steps for computing npv assignment help-homework help by online net present value tutors
tutorsglobe.com how dna is cut assignment help-homework help by online recombinant dna technology tutors
Chemical Pest Control Methods and Their Formulations tutorial all along with the key concepts of What is a Pest, History of Insecticide Development, Ideal Qualities of an Insecticide, Generations of Insecticides, Pesticide Groups, Pesticide Formulations, Types of Formulations
tutorsglobe.com functions of stem assignment help-homework help by online shoot system tutors
Complex Impedances tutorial all along with the key concepts of Equivalent Impedance Transform, Complex Voltage and Current, Device Specific Impedances and Combination of Impedances
tutorsglobe.com simple fruits assignment help-homework help by online structure of fruit tutors
tutorsglobe.com magnesium and calcium assignment help-homework help by online physiological role and deficiency symptoms tutors
theory and lecture notes of chomsky’s hierarchy all along with the key concepts of chomsky’s hierarchy, grammars and languages, phrase structure grammar, context sensitive and context free. tutorsglobe offers homework help, assignment help and tutor’s assistance on chomsky’s hierarchy.
theory and lecture notes of matlab and solving equations all along with the key concepts of matlab and solving equations, matlab programs, secant methods. tutorsglobe offers homework help, assignment help and tutor’s assistance on matlab and solving equations.
1958040
Questions Asked
3689
Tutors
1457399
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!