Genotypic variation of sugarcane for salinity tolerance: Morphological and physiological responses

IF 1.2 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI:10.1590/1413-7054202246000122

Antonia Almeida da Silva, Zulma Catherine Cardenal Rubio, Paulo Cássio Alves Linhares, Ketlen Rocha e Silva, G. V. Pimentel, P. Marchiori

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引用次数: 0

Abstract

ABSTRACT Sugarcane (Saccharum spp.) is an important crop due to sugar, ethanol and bioenergy production. Its cultivation may occur in tropical regions exposed to high salinity. The aim was to identify cultivars tolerant to salinity to allow the cultivation of sugarcane (Saccharum spp.) in saline soils. To test the hypothesis that sugarcane show natural genotypic variation to salinity tolerance, we tested ten cultivars (SP80-3280, RB855453 RB966928, RB855156, SP80-1842, SP80-1816, RB928064, RB867515, RB92579, RB855536) and two sugarcane species: IM76-228 (S. robustum) and IN84-82 (S. spontaneum) under two concentrations of sodium chloride (NaCl): control (concentration found naturally in the soil used: electrical conductivity of 0.083 dS m-1) and soil enriched with NaCl: EC of 7.2 dS m-1. Biometry and photosynthesis traits were evaluated. The plants were collected and leaf (LDM), stem (SDM), root and total dry matter were used to estimate the tolerance index (TI). A cluster analysis was done to identify phenotypic dissimilarity. Three distinct groups regarding salinity tolerance on biomass-basis were formed. The cultivars RB855156, SP80-1842, SP80-1816 and species IM76-228 showed no reduction in LDM and SDM. Nonetheless, the cultivars SP80-3280, RB928064, RB92579 and species IN84-82 were impaired by salinity. The cultivar SP80-1816 showed the highest biomass accumulation and the highest TI. Therefore, we found a great genotypic variation regarding salinity tolerance in sugarcane, which can be explored by growers to cultivate in saline soils. Also can be used by the Sugarcane Breeding Programs to improve the salinity tolerance.

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甘蔗耐盐基因型变异:形态和生理反应

甘蔗(Saccharum spp.)是一种重要的糖、乙醇和生物能源生产作物。它的种植可能发生在高盐度的热带地区。目的是鉴定耐盐品种，以便在盐碱地上种植甘蔗。为了验证甘蔗耐盐性存在天然基因型变异的假设，我们对10个甘蔗品种(SP80-3280、RB855453、RB966928、RB855156、SP80-1842、SP80-1816、RB928064、RB867515、RB92579、RB855536)和2个甘蔗品种IM76-228 (S. robustum)和IN84-82 (S. spontanum)进行了对照(土壤电导率为0.083 dS m-1)和NaCl: EC为7.2 dS m-1的土壤两种氯化钠(NaCl)浓度的试验。生物计量学和光合特性进行了评价。收集植株，用叶片(LDM)、茎(SDM)、根系和总干物质(total dry matter)估算耐受性指数(TI)。进行聚类分析以确定表型差异。在生物量基础上形成了三个不同的耐盐类群。品种RB855156、SP80-1842、SP80-1816和品种IM76-228的LDM和SDM均未降低。而品种SP80-3280、RB928064、RB92579和IN84-82则受盐度影响较大。品种SP80-1816的生物量积累和TI最高。因此，我们发现甘蔗在耐盐性方面存在很大的基因型差异，这可以为种植者在盐碱地上进行栽培提供参考。也可用于甘蔗育种计划，以提高耐盐性。

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来源期刊

Ciencia E Agrotecnologia 农林科学-农业综合

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： A Ciência e Agrotecnologia, editada a cada 2 meses pela Editora da Universidade Federal de Lavras (UFLA), publica artigos científicos de interesse agropecuário elaborados por membros da comunidade científica nacional e internacional. A revista é distribuída em âmbito nacional e internacional para bibliotecas de Faculdades, Universidades e Instituições de Pesquisa.