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EXEMPLES DE SEMENCES RECALCITRANTES CHENE (Quercus sp) NOYER (Juglans sp) CHÂTAIGNIER (Castanea sp) ERABLE (Acer pseudoplatanus) MARRONNIER (Aesculus hippocastaneum) MANGUIER (Mangifera indica) HEVEA (Hevea brasiliensis) AVOCATIER (Persea americana) CAFEIER (Coffea sp.) COCOTIER (Cocos nucifera) LITCHI (Litchi chinensis) CACAOYER (Theobroma cacao) THEIER (Thea sinesis) CITRUS (Citrus sp.) SYMPHONIA GLOBULIFERA, HOPEA ODORATA, H. HAINANENSIS, SHOREA ROXBURGHII, S. ACUMINATA, ARAUCARIA SP. AVICENNIA MARINA
100 a Germination (%) 80 60 40 20 b c d e 0 0 5 10 15 20 25 30 Teneur en eau (% mf) Three typical patterns of desiccation tolerance (normal germination, %, plotted against moisture content, % w.b.) are shown for species with orthodox (a), intermediate (c) and recalcitrant (e) seed storage behaviour. Two further patterns (b and d) are also shown which may be found in species with orthodox and intermediate seed storage behaviour, respectively, where the seed lot has been harvested prematurely or too late, or has been wrongly pretreated. Seeds of some species with recalcitrant seed behaviour are more intolerant of desiccation than those shown by pattern e. From Hong and Ellis 1996
Page 1 and 2: Conservation des semences "Seeds -
Page 3: I. Semences récalcitrantes
Page 8 and 9: SURVIE DES SEMENCES RECALCITRANTES
Page 10 and 11: Exemples de températures critiques
Page 12 and 13: Manguier Plants âgés dun mois Pl
Page 14 and 15: La longévité des semences
Page 18: 1300 ans 2000 ans
Page 21 and 22: Processus physiologiques accompagna
Page 23 and 24: WHAT ARE HIGH QUALITY SEEDS ? They
Page 25 and 26: Ex: semences de tournesol
Page 27: Mécanismes cellulaires de la dét
Page 30 and 31: Germination after 7 days (%) 100 S
Page 32 and 33: H 2 O 2 CONTENT AND LIPID PEROXIDAT
Page 34 and 35: Indicators of oxidative stress Agin
Page 36 and 37: Influence des conditions de conserv
Page 38 and 39: Isothermes de sorption Courbe indiq
Page 40 and 41: SORPTION ISOTHERMS Water content (
Page 42: HYSTERESIS des courbes de sorption
Page 46 and 47: Evaluation de I 'aptitude à la con
Page 49 and 50: La prédiction de la conservation d
Page 52 and 53: Transformation probit des courbes d
Page 54:
Effet des conditions de conservatio
Page 58 and 59:
Déshydrater le plus possible les s
Page 60 and 61:
USDA National Seed Storage Laborato
Page 62 and 63:
Trois types de semences Semences to
Page 65:
Comparison of the threshold embryo
Page 69:
Conclusion Les semences orthodoxes
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