Plant growth promoting activity of seaweed liquid extracts produced from Macrocystis pyrifera under different pH and temperature conditions

被引:50
作者
Briceno-Dominguez, Diego [1 ,2 ]
Hernandez-Carmona, Gustavo [2 ]
Moyo, Mack [3 ]
Stirk, Wendy [3 ]
van Staden, Johannes [3 ]
机构
[1] Inst Tecnol Super Felipe Carrillo Puerto, Lab Ciencias Basicas, Felipe Carrillo Puerto 77200, Quintana Roo, Mexico
[2] Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas CICIMAR, La Paz 23096, Baja Calif Sur, Mexico
[3] Univ KwaZulu Natal Pietermaritzburg, Sch Life Sci, Res Ctr Plant Growth & Dev, ZA-3209 Scottsville, South Africa
关键词
Seaweed extracts; Plant growth; Processing factors; Viscosity; Macrocystis; SOUTHERN LIMIT; AUXIN; BETAINES; DEGRADATION; TOLERANCE; ALGINATE; DROUGHT; YIELD; ACID;
D O I
10.1007/s10811-014-0237-2
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
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 (pH 8-12) and temperature (40, 60, and 80 A degrees 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 pH 10 and 80 A degrees 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 pH 11 and 80 A degrees C, while the fastest tomato seedling growth was achieved with the extract produced at pH 12 and 80 A degrees C.
引用
收藏
页码:2203 / 2210
页数:8
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