Does Domestication Affect Structural and Functional Leaf Epidermal Traits? A Comparison between Wild and Cultivated Mexican Chili Peppers (Capsicum annuum)

被引:4
|
作者
Serrano-Mejia, Carlos [1 ]
Bello-Bedoy, Rafael [1 ]
Clara Arteaga, Maria [2 ]
Castillo, Guillermo R. [3 ]
机构
[1] Univ Autonoma Baja California, Fac Ciencias, Carretera Ensenada Tijuana 3917, Ensenada 22860, Baja California, Mexico
[2] Ctr Invest Cient & Educ Super Ensenada CICESE, Dept Biol Conservac, Ensenada 22860, Baja California, Mexico
[3] Univ Medio Ambiente, Fac Negocios Sostenibles, Valle De Bravo 51200, Estado De Mexic, Mexico
来源
PLANTS-BASEL | 2022年 / 11卷 / 22期
关键词
Capsicum annuum var. glabriusculum; pavement cells; resistance to herbivores; Spodoptera frugiperda; trichomes; stomata; stomatal conductance; PLANT DOMESTICATION; EVOLUTIONARY DIVERGENCE; CROP DOMESTICATION; PHASEOLUS-VULGARIS; RESPONSES; CONDUCTANCE; RESISTANCE; MORPHOLOGY; TRICHOMES; SELECTION;
D O I
10.3390/plants11223062
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
During domestication, lineages diverge phenotypically and genetically from wild relatives, particularly in preferred traits. In addition to evolutionary divergence in selected traits, other fitness-related traits that are unselected may change in concert. For instance, the selection of chili pepper fruits was not intended to change the structure and function of the leaf epidermis. Leaf stomata and trichome densities play a prominent role in regulating stomatal conductance and resistance to herbivores. Here, we assessed whether domestication affected leaf epidermis structure and function in Capsicum annuum. To do this, we compared leaf stomata and trichome densities in six cultivated varieties of Mexican Capsicum annuum and their wild relative. We measured stomatal conductance and resistance to herbivores. Resistance to (defense against) herbivores was measured as variation in the herbivory rate and larvae mortality of Spodoptera frugiperda fed with leaves of wild and cultivated plants. As expected, the different varieties displayed low divergence in stomatal density and conductance. Leaf trichome density was higher in the wild relative, but variation was not correlated with the herbivory rate. In contrast, a higher mortality rate of S. frugiperda larvae was recorded when fed with the wild relative and two varieties than larvae fed with four other varieties. Overall, although domestication did not aim at resistance to herbivores, this evolutionary process produced concerted changes in defensive traits.
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页数:15
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