PDF(Pubmed)
Abstract：
UNASSIGNED: Root system architecture (RSA) plays an important role in the plant\'s ability to sustain yield under abiotic stresses such as drought. Preceding crops (precrops) can affect the yield of the proceeding crop, partially by affecting the RSA. This experiment aims to explore the interactions between precrop identity, crop genotype and drought at early growth stages.
UNASSIGNED: Rhizotrons, sized 60 × 80 × 3.5 cm, were used to assess the early root growth of two winter wheat (Triticum aestivum L.) genotypes, using precrop-treated soil around the seedlings and differing water regimes. The rhizotrons were automatically imaged 3 times a week to track root development.
UNASSIGNED: Precrop-treated soil affected the RSA and changes caused by the reduced water treatment (RWT) were different depending on the precrop. Largest of these was the 36% reduction in root depth after wheat, but 44% after OSR. This indicates that effects caused by the precrop can be simulated, at least partially, by transferring precrop-treated soils to controlled environments. The genotypes had differential RSA and reacted differently to the RWT, with Julius maintaining an 8.8-13.1% deeper root system compared to Brons in the RWT. In addition, the combined environmental treatment affected the genotypes differently.
UNASSIGNED: Our results could help explain discrepancies found from using precrops to enhance yield as they indicate differences in the preceding crop effect when experiencing drought stress. Further, these differences are affected by genotypic interactions, which can be used to select and adapt crop genotypes for specific crop rotations, depending on the year. Additionally, we have shown a viable method of stimulating a partial precrop effect at the seedling stage in a controlled greenhouse setting using field soil around the germinated seed.
UNASSIGNED: Rhizotrons, sized 60 × 80 × 3.5 cm, were used to assess the early root growth of two winter wheat (Triticum aestivum L.) genotypes, using precrop-treated soil around the seedlings and differing water regimes. The rhizotrons were automatically imaged 3 times a week to track root development.
UNASSIGNED: Precrop-treated soil affected the RSA and changes caused by the reduced water treatment (RWT) were different depending on the precrop. Largest of these was the 36% reduction in root depth after wheat, but 44% after OSR. This indicates that effects caused by the precrop can be simulated, at least partially, by transferring precrop-treated soils to controlled environments. The genotypes had differential RSA and reacted differently to the RWT, with Julius maintaining an 8.8-13.1% deeper root system compared to Brons in the RWT. In addition, the combined environmental treatment affected the genotypes differently.
UNASSIGNED: Our results could help explain discrepancies found from using precrops to enhance yield as they indicate differences in the preceding crop effect when experiencing drought stress. Further, these differences are affected by genotypic interactions, which can be used to select and adapt crop genotypes for specific crop rotations, depending on the year. Additionally, we have shown a viable method of stimulating a partial precrop effect at the seedling stage in a controlled greenhouse setting using field soil around the germinated seed.
摘要：
■根系结构（RSA）对植物在干旱等非生物胁迫下维持产量的能力起着重要作用。前种作物(前种作物)会影响前种作物的产量，部分是通过影响RSA。本实验旨在探索precrop身份之间的相互作用，作物基因型和早期生长阶段的干旱。
■根茎，尺寸60×80×3.5厘米，用于评估两种冬小麦（TriticumaestivumL.）基因型的早期根系生长，使用幼苗周围的预清除处理土壤和不同的水分状况。根茎每周自动成像3次，以跟踪根的发育。
■Precrop处理的土壤影响了RSA，并且由减少的水处理（RWT）引起的变化因precrop而异。其中最大的是小麦后根深减少了36％，但在OSR之后为44%。这表明可以模拟预剪切引起的影响，至少部分地,通过将预耕作处理的土壤转移到受控环境中。基因型具有不同的RSA，并且与RWT反应不同，与RWT中的Broons相比，Julius的根系深度为8.8-13.1％。此外,联合环境处理对基因型的影响不同。
■我们的结果可以帮助解释使用前作物来提高产量的差异，因为它们表明在经历干旱胁迫时先前作物效应的差异。Further,这些差异受基因型相互作用的影响，可用于选择和适应特定作物轮作的作物基因型，取决于年份。此外,我们已经展示了一种可行的方法，可以在受控的温室环境中使用发芽种子周围的田间土壤来刺激苗期的部分预作效应。
■根茎，尺寸60×80×3.5厘米，用于评估两种冬小麦（TriticumaestivumL.）基因型的早期根系生长，使用幼苗周围的预清除处理土壤和不同的水分状况。根茎每周自动成像3次，以跟踪根的发育。
■Precrop处理的土壤影响了RSA，并且由减少的水处理（RWT）引起的变化因precrop而异。其中最大的是小麦后根深减少了36％，但在OSR之后为44%。这表明可以模拟预剪切引起的影响，至少部分地,通过将预耕作处理的土壤转移到受控环境中。基因型具有不同的RSA，并且与RWT反应不同，与RWT中的Broons相比，Julius的根系深度为8.8-13.1％。此外,联合环境处理对基因型的影响不同。
■我们的结果可以帮助解释使用前作物来提高产量的差异，因为它们表明在经历干旱胁迫时先前作物效应的差异。Further,这些差异受基因型相互作用的影响，可用于选择和适应特定作物轮作的作物基因型，取决于年份。此外,我们已经展示了一种可行的方法，可以在受控的温室环境中使用发芽种子周围的田间土壤来刺激苗期的部分预作效应。
