Periodicity and Control of Secondar

Periodicity and Control of Secondary Growth
• Diameter growth of North Temperate Zone trees is typically characterized by a single annual ring. In addition to variation caused by species, age, and soil conditions, the width of the growth ring depends largely on weather conditions of the current year, especially temperature and soil water.
• The initiation of cambial growth in the spring is closely associated with renewed bud activity and leaf development.
• Growth-regulating hormones,auxin, and other substances (promoters and inhibitors) from the expanding buds and leaves trigger cambial activity
• In coniferrs, cambial activity begins at the base of actively developing buds and leafy shoots ( before shoot extention begins) in the crown and moves rapidly downward throughout the shoots,branches, and the main stem.

Hasil (Bahasa Indonesia) 1:

Periodisitas dan kontrol sekunder pertumbuhan• Pertumbuhan diameter pohon zona iklim sedang Utara biasanya ditandai dengan sebuah cincin tahunan tunggal. Selain variasi disebabkan oleh spesies, usia dan kondisi tanah, lebar pertumbuhan cincin tergantung pada kondisi cuaca saat ini tahun, khususnya suhu dan tanah air.• Inisiasi cambial pertumbuhan di musim semi sangat erat kaitannya dengan kegiatan baru tunas dan daun pembangunan.• Mengatur pertumbuhan hormon, Auksin, dan zat lain (promotor dan inhibitor) dari perluasan tunas dan daun memicu cambial aktivitas• Di coniferrs, kegiatan cambial dimulai di dasar aktif mengembangkan tunas dan tunas berdaun (sebelum menembak extention dimulai) di mahkota dan bergerak cepat ke bawah seluruh tunas, cabang, dan batang utama.