a) Growth of pollen tube towards the ovule. Sperm cells exist at the tip of the tube. Pollen tube contents (PTC) are the liquid part of the pollen tube, shown in yellow. b) Upon pollination to the ...

Sexual reproduction of plants requires pollen to land on the stigma, which then germinates and grows pollen tubes through the style to deliver sperm cells to the ovule. Pollen tubes are the ...

Uridine-H 3 is incorporated into both the vegetative (tube) nucleus and the generative nucleus of Tradescantia paludosa within 15 min after transfer of pollen to the growth medium. This incorporation ...

Plants with multiple sets of chromosomes, known as polyploids, are salt-tolerant or drought-resistant and often achieve higher yields. However, newly formed polyploid plants are often sterile or have ...

Little is known about reproductive biology in Sphaeralcea, a remarkably variable genus of mostly xerophytic and weedy perennial herbs. Understanding mating systems in Sphaeralcea may help explain the ...

Researchers have shown that the pollen tube of male grain has no issues rising to the occasion. The sexual organ of male grain grows several thousand times its own length in its desire to reach the ...

You might think flowers don't have much choice about who they mate with, given they are rooted to the ground and can't move. Most mammals and humans have a double set of chromosomes—and as a rule, ...