Effects of abiotic factors on growth and chemical defenses in cultivated clones of Laurencia dendroidea J. Agardh (Ceramiales, Rhodophyta)

被引：58

作者：

Sudatti, Daniela Bueno ^{[1
]}

Fujii, Mutue Toyota ^{[2
]}

Rodrigues, Silvana Vianna ^{[3
]}

Turra, Alexander ^{[4
]}

Pereira, Renato Crespo ^{[1
]}

机构：

[1] Univ Fed Fluminense, Inst Biol, Dept Biol Marinha, BR-24001970 Rio De Janeiro, Brazil

[2] Inst Bot, Dept Ficol, Sao Paulo, Brazil

[3] Univ Fed Fluminense, Dept Quim Analit, BR-24001970 Rio De Janeiro, Brazil

[4] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, BR-05508900 Sao Paulo, Brazil

来源：

MARINE BIOLOGY | 2011年 / 158卷 / 07期

关键词：

NUTRIENT AVAILABILITY; HALOGENATED METABOLITES; PHLOROTANNIN PRODUCTION; SECONDARY METABOLITES; PHENOL CONTENT; RHODOMELACEAE; HERBIVORY; NITROGEN; ELATOL; PHOTOSYNTHESIS;

D O I：

10.1007/s00227-011-1660-4

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

Laurencia dendroidea shows high inter- and intrapopulation variability in the amount of the sesquiterpene elatol, caused by genetic variation as well as environmental factors. To test the independent effect of physical and nutritional conditions, the growth and the levels of elatol in L. dendroidea clones were evaluated under different conditions of temperature, salinity, irradiance, and culture medium in the laboratory. Growth of L. dendroidea was clearly affected by all these factors, but elatol levels were influenced only by temperature and salinity. Better conditions for growth did not produce a similar effect on elatol production in L. dendroidea, contradicting the carbon/nutrient balance and growth/differentiation balance models. On the contrary, severe conditions of temperature and salinity promoted a decrease in elatol levels, as predicted by the environmental stress model. Our results using clones indicated that abiotic factors clearly take part in fostering chemical variations observed in natural populations, in addition to genetic factors, and can promote differential susceptibility of plant specimens to natural enemies.

引用

页码：1439 / 1446

页数：8

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