A Research into the Amyloclastic Secretory Capacities 
of the Embryo and Aleurone Layer of Hordeum with 
Special Reference to the Question of the Vitality 
and Auto-depletion of the Endosperm. 
PART II. 
BY 
F. STOWARD. 
Contents of Part II. 
PAGE 
V. On the Partial Suppression of the Amyloclastic Secretory Function of 
the Aleurone Layer.. 1147 
VI. The Behaviour of the Inner Endosperm Tissue towards Anaesthetic Re¬ 
agents: the Probable Non-possession of Vitality by this Tissue . . 1150 
VII. Starch-liquefying and Saccharifying Properties of (i) Embryo and 
Aleurone-layer Secretions, (2) Extracts of Endosperms and Inner 
Endosperms , . . , 1154 
VIII. The Influence of Various Carbohydrates on the Secretion of Amylase by 
the Embryo and Aleurone Layer ..1162 
IX. Investigation of the Amylase Content of the Scutella of Barley Seedlings i 167 
X. The Secretion of Cytase by the Embryo and Aleurone Layer . . . 1169 
XI. Influence of the Embryo on the Augmentation of Amylase by the Inner 
Endosperm. 1175 
XII. The Inactivation of the Amylase of Ungerminated Barley . . .1176 
XIII. The Inadmissibility of Copper Sulphate as a Sterilizing Agent . .1181 
XIV. Investigation of Material by the Auto- and Papain-digestion Methods. 1182 
XV. Investigation of Amylase Content of the Tissues of Tropaeolum by 
Direct, Auto-, and Papain-digestion Methods ...... 1197 
XVI. Summary of Conclusions.1200 
V. On the Partial Suppression of the Amyloclastic 
Secretory Function of the Aleurone Layer. 
I N the foregoing sections the methods of eliminating the functional in¬ 
fluence of the aleurone layer rest on its actual removal (by filing or 
cutting it off), or on the annihilation of the secretory mechanism by the 
action of anaesthetic reagents which by prolonged contact eventually cause 
the death of this tissue. 
There remains yet another method of suppressing wholly, or at least 
partially, its secretory functions, namely, by conducting culture experiments 
[Annals of Botany, Vol, XXV. No. C. October, 1911,] 
