Pollen germination
To show pollen germination.
Lo que aprenden los alumnos
La base científica de este experimento
In angiosperm plants, petals have the primary function of attracting insects to serve as pollinators. After landing on the stigma, or tip of the pistil, the pollen germinates to form a pollen tube, which penetrates the tissues of the style and ultimately enters the cavity of the ovary.
Equipo utilizado
- Petri dishes — 1253.00
- Filter paper — 8349.20
- Tweezers — 8261.30
- Microscope slides — 1388.00
- Microscope — 8542.12
- Pollen
Productos químicos y reactivos
- Distilled water
- Development solution
Notas de seguridad
Preguntas para los alumnos
- Describe what you see over time.
- Can you make a hypothesis about what causes pollen germination?
- What are the main ways of pollen distribution?
- Describe briefly how the pollen tubes contribute to fertilisation.
Qué puedes esperar
<p>Time after time an increasing number of pollen granules develops tubes.</p><p>Some pollen germinates in 510 minutes and continues to lengthen for an hour.</p><p>Pollen lands in many places but germinates only on the stigma of the ovary.</p><p>Boric acid and sucrose solution emulate this favourable environment.</p><p>Wind and insects are the main agents responsible for pollination but also birds and water.</p><p>During evolution plants developed several methods to ensure cross pollination.</p><p>If pollination succeeds, the pollen tube grows from the stigma, penetrating the tissues of the style, to the cavity of the ovary.</p><p>In the ovary the pollen tube enters the ovule and deposits haploid sperm cells in the embryo sac.</p>
Eliminación
Realiza este experimento en tu clase
Este experimento forma parte del « Mobile Lab » de ATP, un laboratorio autónomo que convierte un aula normal en un laboratorio de ciencias en pleno funcionamiento, con más de 200 experimentos de física, química, biología, robótica e ingeniería. « Gali », el tutor de IA integrado en ATP Connect, guía a los alumnos paso a paso y responde a sus preguntas en la mesa de trabajo.
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