Response of Two Wheat Cultivars to CO(2) Enrichment under Subambient Oxygen Conditions.-猫眼课题宝

两个小麦品种在低于常温的氧气条件下对 CO(2) 富集的响应。

DOI：

10.1104/pp.87.2.346

发表时间：

1988

期刊：

Plant physiology

影响因子：

7.4

通讯作者：

中科院分区：

生物学1区

文献类型：

作者：

M. Musgrave;B. Strain

小麦（Triticum aestivum L.）cvsSonoita和YecoraRojo）在生长室中的四个子室中在两种CO（2）水平（350或1000微升/升）下在环境（21%）或低O（2）（5%）下生长至成熟。生长分析被用来表征植物碳预算的变化所施加的气体制度。在低O（2）处理中看到叶面积的大幅增加，主要是由于分蘖的刺激。根在5%O（2）下发育正常。种子发育受到低于环境温度的O（2）处理的抑制，但这种影响被1000微升/升的CO（2）富集所克服。干物质积累和种子数对气体处理的反应不同。干物质生产量最大的是低O2、高CO2处理，而种子生产量最大的是常O2、高CO2处理。无论是CO（2）富集还是低O（2），对Yecora Rojo的生长和同化的刺激都大于Sonoita。本试验首次探索了全株低O2处理对生长和繁殖的影响。CO（2）富集克服了低O（2）诱导的不育性，这一发现可能有助于阐明这种效应的本质。

Two cultivars of wheat (Triticum aestivum L. cvs Sonoita and Yecora Rojo) were grown to maturity in a growth chamber within four sub-chambers under two CO(2) levels (350 or 1000 microliters per liter) at either ambient (21%) or low O(2) (5%). Growth analysis was used to characterize changes in plant carbon budgets imposed by the gas regimes. Large increases in leaf areas were seen in the low O(2) treatments, due primarily to a stimulation of tillering. Roots developed normally at 5% O(2). Seed development was inhibited by the subambient O(2) treatment, but this effect was overcome by CO(2) enrichment at 1000 microliters per liter. Dry matter accumulation and seed number responded differently to the gas treatments. The greatest dry matter production occurred in the low O(2), high CO(2) treatment, while the greatest seed production occurred in the ambient O(2), high CO(2) treatment. Growth and assimilation were stimulated more by either CO(2) enrichment or low O(2) in cv Yecora Rojo than in Sonoita. These experiments are the first to explore the effect of whole plant low O(2) treatments on growth and reproduction. The finding that CO(2) enrichment overcomes low O(2)-induced sterility may help elucidate the nature of this effect.

Response of two pea hybrids to CO2 enrichment: a test of the energy overflow hypothesis for alternative respiration.