abscission zone造句

• In peach, PG activity was only detected in fruit abscission zones.
• A similar process of cell separation caused by the breakdown of pectin occurs in the abscission zone of the petioles of deciduous plants at leaf fall.
• Leaves tend to have a shorter life span than the stems or branches that bear them, and when they fall, an area at the attachment zone, called an "'abscission zone "'leaves a scar on the stem.
• The loss of bootjacks is a natural, if poorly understood, phenomenon as the palm does not create a leaf abscission zone so the loss of the leaf bases results from some other physical or biological process.
• The sealing off of a certain area ( called the abscission zone ) of the petiole, or leaf stem, influences the flow of sugars in and out of the leaves and the balance of plant growth hormones called auxins.