x Contents 



Chapter 10. Tissue Mixtures 258 



Stock-scion interrelations — Chimeras — Somatic mutations. 



Chapter 11. Abnormal Growth 275 



Abnormal development of organs — Production of new types of organized 

 structures — Amorphous structures. 



PART THREE. MORPHOGENETIC FACTORS 



Chapter 12. Introduction to Factors 303 



Chapter 13. Light 308 



Intensity of light — Quality of light - Duration of light — Relation to other 

 factors. 



Chapter 14. Water 324 



Xeromorphy — Experimental work — Effect of the transpiration stream. 



Chapter 15. Temperature 337 



Thermoperiodism — Vernalization — Other temperature effects. 



Chapter 16. Various Physical Factors 345 



Tension — Compression — Bending and swaying — Ultrasonics — Gravity — 

 Tissue tension — Absolute size — Bioelectrical factors. 



Chapter 17. Chemical Factors in General 363 



Elements — More complex substances. 

 Chapter 18. Growth Substances 374 



Types of growth substances — Growth substances and plant growth — Growth 

 substances and correlation — Growth substances and the determination of 

 structure — Growth substances and internal differentiation — Other formative 

 effects — Mechanism of action. 



Chapter 19. Genetic Factors 415 



Genes — Cytoplasm — Chromosomes. 

 Chapter 20. Organization 449 



Bibliography 461 



Name Index 527 



Subject Index 538 



