AP BIOLOGY

Detailed explanation-1: -Soaking of shallot seeds in 100 ppm gibberellins solution for 30 minutes can increase plant height and the number of leaves [7]. Meanwhile, the immersion treatment of shallot seeds (Tuktuk variety) using gibberellin solution for 4 hours could increase the percentage of germination by 85.33% [8].

Detailed explanation-2: -In short, you fold up a small piece of paper towel, place the seeds in it, along with a pinch of GA3, and add a few drops of water. Let sit for 24 hours in a plastic baggie. Then treat as normal for germination.

Detailed explanation-3: -GA Signaling in Dormancy and Seed Germination GA exerts its influence in two manners, first by increasing the growth potential of embryo and second by inducing hydrolytic enzymes.

Detailed explanation-4: -A frequently-used technique is to immerse the seeds in 4–10 times their volume of boiling water (100°C), remove the heat source, and allow the seeds to soak in the gradually cooling water for 12–24 h. This method is widely applied but can give erratic results.

Detailed explanation-5: -Bioactive gibberellins (GAs) promote seed germination in a number of plant species. In dicots, such as tomato and Arabidopsis, de novo GA biosynthesis after seed imbibition is essential for germination. Light is a crucial environmental cue determining seed germination in some species.