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脱落酸和油菜素内酯对中国东北松嫩平原草原羊草光合特性的影响。

Effects of abscisic acid and brassinolide on photosynthetic characteristics of Leymus chinensis from Songnen Plain grassland in Northeast China.

作者信息

Hu Yong-Jun, Shi Lian-Xuan, Sun Wei, Guo Ji-Xun

机构信息

Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024, China.

School of Life Sciences, Changchun Normal University, Changchun, 130032, China.

出版信息

Bot Stud. 2013 Dec;54(1):42. doi: 10.1186/1999-3110-54-42. Epub 2013 Oct 2.

DOI:10.1186/1999-3110-54-42
PMID:28510904
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5430352/
Abstract

BACKGROUND

It has been well demonstrated that plant growth regulators have important functions in multiple physiological processes. ABA and BR play crucial roles in response of crops to stresses. Photosynthetic capacity of Leymus. chinensis treated by various concentrations of ABA and BR in combination was determined. Further more, the mechanisms of ABA and BR treatments and potential for recovery of saline-alkali grasslands were discussed.

RESULTS

Abscisic acid (ABA) and brassinolide (BR) affected leaf gas exchange, growth and biomass of L. chinensis. The application of ABA and BR mixtures, especially that of 0.01 mM ABA and 2 × 10 mM BR, increased the net photosynthetic rate, stomatal conductance, water use efficiency, the maximum net photosynthetic rate, light-saturated rate, leaf respiration rate, the maximum RUBP carboxylation rate, the maximum electron transport rate, the maximum triose-phosphate utilization, carboxylation efficiency and the quantum efficiency of PSII and subsequently enhanced density, height and biomass in L. chinensis. We also observed reduction in the light compensation and saturation points following the application of ABA and BR treatments.

CONCLUSIONS

We concluded that proper use of plant growth regulators can enhance the plant growth and productivity on the Songnen grassland, which is particularly important for the improvement of saline - alkaline grassland and the yield of grazing lands.

摘要

背景

已有充分证据表明，植物生长调节剂在多种生理过程中具有重要作用。脱落酸（ABA）和油菜素内酯（BR）在作物应对胁迫方面发挥着关键作用。测定了经不同浓度ABA和BR组合处理的羊草的光合能力，并进一步探讨了ABA和BR处理的机制以及盐碱化草地的恢复潜力。

结果

脱落酸（ABA）和油菜素内酯（BR）影响羊草叶片的气体交换、生长和生物量。ABA和BR混合物的施用，尤其是0.01 mM ABA和2×10 mM BR的混合物，提高了羊草的净光合速率、气孔导度、水分利用效率、最大净光合速率、光饱和速率、叶片呼吸速率、最大核酮糖-1,5-二磷酸羧化速率、最大电子传递速率、最大磷酸丙糖利用速率、羧化效率和PSII的量子效率，进而提高了羊草的密度、株高和生物量。我们还观察到，施用ABA和BR处理后，光补偿点和光饱和点降低了。

结论

我们得出结论，合理使用植物生长调节剂可以提高松嫩草原的植物生长和生产力，这对于盐碱化草地的改良和放牧地的产量提高尤为重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/d9f784b7eed5/40529_2011_Article_94_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/a12ff8aba8d4/40529_2011_Article_94_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/875fb82cf2b3/40529_2011_Article_94_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/a2e6dfbf099a/40529_2011_Article_94_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/41c8a0c0a95d/40529_2011_Article_94_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/d9f784b7eed5/40529_2011_Article_94_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/a12ff8aba8d4/40529_2011_Article_94_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/875fb82cf2b3/40529_2011_Article_94_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/a2e6dfbf099a/40529_2011_Article_94_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/41c8a0c0a95d/40529_2011_Article_94_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e5b2/5430352/d9f784b7eed5/40529_2011_Article_94_Fig5_HTML.jpg

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