Correlation among vegetative and reproductive variables in wheat under a climate change simulation

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
Leandris Argentel-Martínez, O. Peñuelas-Rubio, José Aurelio Leyva Ponce, Tulio Arredondo, J. Garatuza‐Payán, E. Yépez
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引用次数: 1

Abstract

Based on climate change scenarios predicted for northwestern Mexico, an experiment was carried out during the 2016– 2017 and 2017–2018 crop cycles, under field conditions in wheat, in the Yaqui Valley, Sonora, Mexico. The assay consisted on canopy temperature increase by + 2 °C with respect to ambient temperature, using a temperature free-air controlled enhancement (T-FACE) system for temperature manipulation and control. This experiment aimed to determine the existing correlation among vegetative and reproductive variables that can result precise indicators of warming tolerance. A total of 30 variables divided into: morphological (6), physiological (7), biochemical (8) and agronomic (9) indicators were evaluated, using CIRNO C2008 cultivar as experimental model. For each variable, the response index, in a total of five repetition each year, was computed. Results indicated that, during the vegetative stages, the most precise variables for heat tolerance evaluation were: dry matter, vegetal vigor, water potential, nitrate reductase and transpiration indexes; while during the reproductive stage were: grain and biomass yield, spike mass and vain grain per spike indexes. There was a positive correlation among the most majority of vegetative and reproductive variables, being water and osmotic potential indexes those with the greatest contribution to biomass and grain yield. From the 30 evaluated variables, water and osmotic potential, transpiration, grain yield and field water use efficiency indexes were the most precise indicator of heat tolerance in CIRNO C2008 under canopy temperature increase in + 2 °C.
气候变化模拟下小麦营养与生殖变量的相关性研究
基于对墨西哥西北部气候变化情景的预测,在2016 - 2017年和2017 - 2018年作物周期,在墨西哥索诺拉雅基山谷的小麦田间条件下进行了一项试验。实验包括树冠温度相对于环境温度升高+ 2°C,使用温度自由空气控制增强(T-FACE)系统进行温度操作和控制。本实验旨在确定植物的营养和生殖变量之间存在的相关性,从而得出准确的耐热性指标。以CIRNO C2008品种为实验模型,对形态(6)、生理(7)、生化(8)和农艺(9)指标共30个变量进行评价。对于每个变量,每年共重复5次,计算响应指数。结果表明,在营养阶段,最准确的耐热性评价指标为干物质、植物活力、水势、硝酸还原酶和蒸腾指标;生殖期为:籽粒和生物量、穗质量和每穗徒粒数。绝大多数营养和生殖指标之间存在正相关关系,其中水分和渗透势指标对生物量和产量的贡献最大。在30个评价变量中,水分和渗透势、蒸腾、籽粒产量和田间水分利用效率指标是冠层温度升高+ 2°C下CIRNO C2008的耐热性最准确的指标。
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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