General Metabolism of Hevea Brasiliensis Latex (with the Exception of Isoprenic Anabolism)

Content Provider	Scilit
Author	Jacob, J. -L. Prévôt, J. -C. Kekwick, R. G. O.
Copyright Year	2018
Description	The first work carried out (inevitably in vitro) with a view to obtaining information about latex catabolism used the respiratory quotient (RQ) $(CO_{2}$ $produced/O_{2}$ consumed) measured by means of manometric techniques.$ ^{39} ^{,} ^{457} ^{,} ^{484}$ The RQ is really only meaningful when mitochondria are present, as only these are able simultaneously to produce $CO_{2}$, (Krebs cycle) and to take in $O_{2}$ (cytochrome chain) which are truly respiratory phenomena. The almost complete absence of mitochondria in the latex collected during tapping$ ^{57} ^{,} ^{115} ^{,} ^{154}$ thus explains the very low oxygen consumption in vitro (Figure 1),$ ^{484}$ and the very high values of QR (10 < QR < 100) found under these conditions, with or without added substrate (sucrose, glucose, fructose, acetate, etc.).$ ^{39} ^{,} ^{457} ^{,} ^{484}$ Oxygen consumption is caused essentially by the functioning of various oxidases associated mainly with subcellular particles.$ ^{230}$ This is the case for the peroxidase$ ^{142}$ and NADH-quinone reductase$ ^{57} ^{,} ^{115}$ associated with the lutoids and the o-diphenoloxidase connected with the Frey-Wyssling particles.$ ^{142}$ Book Name: Physiology of Rubber Tree Latex
Related Links	https://content.taylorfrancis.com/books/download?dac=C2017-0-66980-5&isbn=9781351075695&doi=10.1201/9781351075695-6&format=pdf
Ending Page	144
Page Count	44
Starting Page	101
DOI	10.1201/9781351075695-6
Language	English
Publisher	Informa UK Limited
Publisher Date	2018-01-18
Access Restriction	Open
Subject Keyword	Book Name: Physiology of Rubber Tree Latex Mitochondria Oxygen Consumption Hevea Brasiliensis
Content Type	Text
Resource Type	Chapter