TY - JOUR
T1 - Plant growth promoting activity of seaweed liquid extracts produced from Macrocystis pyrifera under different pH and temperature conditions
AU - Briceño-Domínguez, Diego
AU - Hernández-Carmona, Gustavo
AU - Moyo, Mack
AU - Stirk, Wendy
AU - van Staden, Johannes
N1 - Publisher Copyright:
© 2014, Springer Science+Business Media Dordrecht.
PY - 2014/10/17
Y1 - 2014/10/17
N2 - Most commercial algal extracts are produced from brown algae by alkaline hydrolysis; however, little scientific information has been published regarding the details of the production process. In this research, we have investigated the effect of pH (pH8–12) and temperature (40, 60, and 80°C) on liquid extract production from the brown alga Macrocystis pyrifera. Production conditions influenced the physicochemical characteristics of the final product as the extract viscosity increased with increasing pH and temperature to a maximum which occurred at pH10 and 80°C. This suggests that at higher pH conditions, alginate and other polysaccharides were extracted. All the extracts obtained promoted growth of tomato plants (Solanum lycopersicum) and adventitious root formation in the mung bean cutting bioassay (Vigna radiata), as the pH process was increased during the production of the liquid extracts. The highest auxin-type activity was obtained with the extract produced at pH11 and 80°C, while the fastest tomato seedling growth was achieved with the extract produced at pH12 and 80°C.
AB - Most commercial algal extracts are produced from brown algae by alkaline hydrolysis; however, little scientific information has been published regarding the details of the production process. In this research, we have investigated the effect of pH (pH8–12) and temperature (40, 60, and 80°C) on liquid extract production from the brown alga Macrocystis pyrifera. Production conditions influenced the physicochemical characteristics of the final product as the extract viscosity increased with increasing pH and temperature to a maximum which occurred at pH10 and 80°C. This suggests that at higher pH conditions, alginate and other polysaccharides were extracted. All the extracts obtained promoted growth of tomato plants (Solanum lycopersicum) and adventitious root formation in the mung bean cutting bioassay (Vigna radiata), as the pH process was increased during the production of the liquid extracts. The highest auxin-type activity was obtained with the extract produced at pH11 and 80°C, while the fastest tomato seedling growth was achieved with the extract produced at pH12 and 80°C.
KW - Macrocystis
KW - Plant growth
KW - Processing factors
KW - Seaweed extracts
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=84910144788&partnerID=8YFLogxK
U2 - 10.1007/s10811-014-0237-2
DO - 10.1007/s10811-014-0237-2
M3 - Artículo
SN - 0921-8971
VL - 26
SP - 2203
EP - 2210
JO - Journal of Applied Phycology
JF - Journal of Applied Phycology
IS - 5
ER -