Contrasting development of lysigenous aerenchyma in two rice genotypes under phosphorus deficiency

被引：12

作者：

Pujol V. ^{[1
]}

Wissuwa M. ^{[1
]}

机构：

[1] Crop, Livestock and Environment Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Ibaraki

来源：

BMC Research Notes | / 11卷 / 1期

基金：

日本学术振兴会;

关键词：

Lysigenous aerenchyma; Phosphorus deficiency; Phosphorus use efficiency; Rice; Root porosity;

D O I：

10.1186/s13104-018-3179-y

中图分类号：

学科分类号：

摘要：

Objectives: Phosphorus (P) deficiency is a major limitation to plant growth. Under several abiotic stresses, including P deficiency, upland cereal crops, such as maize, are well known to develop lysigenous aerenchyma, a root tissue containing gas spaces. Contrary to upland species, rice develops aerenchyma constitutively. Nevertheless, aerenchyma in rice is also enhanced by several abiotic stresses, including P deficiency. However, studies are limited and genotypic differences are not clear. Results: The formation of inducible aerenchyma in response to P deficiency was evaluated in two rice genotypes, DJ123 and Nerica4. Whole root porosity increased for both genotypes in low P conditions, but was more pronounced in DJ123. Direct aerenchyma measurements, at 20 and 30 mm from the seminal root tip, revealed that aerenchyma in low P conditions was only enhanced in DJ123. These results confirm that P deficiency in rice induces the formation of aerenchyma, and further show that genotypic differences exist. Interestingly, DJ123 is considered tolerant to P deficiency, whereas Nerica4 is sensitive, pointing towards a potential role of aerenchyma in tolerance to P deficiency. © 2018 The Author(s).

引用

共 27 条

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