chapter 12 Senescence Physiology
chapter 12 Senescence Physiology
复习: Chapter 5: Plant reproductive physiology Induction Signal Competent: Expressed Able to respond in Able to follow same expected manner developmental The apical meristem when given the Photoperiod program even after Hormones? undergoes ppropriate removal from its normal position in morphogenesis developmental Vegetative growth Flowers Chapter 6: Plant maturation and senescence a Fertilized nucleus (3n) Quiescent Developing egg (2n)
Chapter 5:Plant reproductive physiology Chapter 6:Plant maturation and senescence 复习:
Plant maturation and senescence Obiectives of this chapter. Formation of fruit and seed(Parthenocarpy Physiological changes during seed and fruit development (conversion of organic compound,, respiration climacteric) >Understand the concept and categories of dormancy General types of plant senescence > The physiological and biochemical changes during senescence >Mechanism of plant senescence > Environmental influences on senescence
Plant maturation and senescence Objectives of this chapter: ➢Formation of fruit and seed (Parthenocarpy) ➢Physiological changes during seed and fruit development (conversion of organic compound,, respiration climacteric) ➢Understand the concept and categories of dormancy ➢General types of plant senescence ➢The physiological and biochemical changes during senescence ➢Mechanism of plant senescence ➢Environmental influences on senescence
Plant maturation and senescence Objectives of this chapter: Formation of fruit and seed Physiological changes during seed and fruit development(conversion of organic compound, Parthenocarpy, respiration climacteric) >Understand the concept, categories, causes of dormancy General types of plant senescence The physiological and biochemical changes during senescence Mechanism of plant senescence >Environmental influences on senescence
Plant maturation and senescence Objectives of this chapter: ➢Formation of fruit and seed ➢Physiological changes during seed and fruit development (conversion of organic compound, Parthenocarpy, respiration climacteric) ➢Understand the concept, categories, causes of dormancy ➢General types of plant senescence ➢The physiological and biochemical changes during senescence ➢Mechanism of plant senescence ➢Environmental influences on senescence
Origin of fruit and seed Pollination Stigma柱头 Ovule develops to seed Style The fertilized egg(zygote) grows Pollen tube into the embryo(2n) Ovule Oary子房 The fertilized endosperm nucleus 胚珠 eD+ Integument珠被 forms the nutritive endosperm(3n) The integument forms the seed coat E (testa)(2n) Fertilization Female Fertilized gametophyte nucleus (n) Cotyledons Ax Fertilized Embryogenesis
Ovule 珠被 子房 柱头 胚珠 Ovule develops to seed The fertilized egg (zygote) grows into the embryo (2n) The fertilized endosperm nucleus forms the nutritive endosperm (3n) The integument forms the seed coat (testa) (2n) Origin of fruit and seed