Comparative Study on Root and Leaf Photosynthesis of Allium polyrhizum from Different Sources under Drought Stress

doi:10.7668/hbnxb.20192170

Abstract

Abstract:

In order to clarify the drought resistance and drought resistance mechanism of Allium polyrhizum in Inner Mongolia grassland,potted water control method was adopted.Two gradients were set,75% of the maximum field water capacity as the control(CK),and 25% of the soil relative water content under 30 days of drought stress.The root morphology,physiological characteristics and leaf photosynthetic characteristics of Allium polyrhizum from different sources were analyzed under drought stress. The result showed that Allium polyrhizum in Siziwang Banner compared with the Chifeng and Ordos was remaining relatively high root surface area,root volume and root length 0-0.5 mm in diameter. Allium polyrhizum root growth was relatively less affected by drought stress,chloroplasts were relatively stable and strong drought resistance in Siziwang Banner. Drought stress significantly decreased the above ground biomass,below ground biomass and total biomass of Allium polyrhizum in Chifeng and Ordos,but had no significant effects on Siziwang Banner(P>0.05). The Pn,Tr,Gs,Ci and leaves relative water content of Allium polyrhizum seedlings were significantly decreased and the relative permeability of cytoplasmic membrane was markedly increased under the whole drought stress treatment. Drought stress induced stomatal closure of Allium polyrhizum leaves and reduced transpiration to decrease water loss.The root characteristics,relative water content,chlorophyll and photosynthetic characteristics of Allium polyrhizum in different sources were certain differences under the same treatment. In general,the effect of drought stress on Allium polyrhizum in Siziwang Banner was relatively weak,it was indicating stronger drought tolerance.

Key words: Allium polyrhizum, Drought stress, Root growth, Photosynthesis characteristics

BAO Xiuxia, LIAN Yong, MU Zongjie, ZHANG Huan. Comparative Study on Root and Leaf Photosynthesis of Allium polyrhizum from Different Sources under Drought Stress[J]. Acta Agriculturae Boreali-Sinica, 2022, 37(4): 122-127. doi: 10.7668/hbnxb.20192170.

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References 31

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采样点 Sample plots		根长/cm Root length				根系表面积/cm² Root surface area				根系体积/cm³ Root volume				直径为0~0.5 mm根长/mm Root length with diameter 0-0.5 mm
采样点 Sample plots		对照CK		处理T		对照CK		处理T		对照CK		处理T		对照CK		处理T
四子王旗Siziwang Banner	892.99±2.07Bb		1 043.79±2.42Aa		135.66±1.13Bb		266.15±1.66Aa		3.24±0.58Aa		4.02±0.61Aa		849.61±2.94Aa		739.89±2.16Ab
赤峰Chifeng	889.05±2.03Ba		939.69±2.27Ba		93.23±0.95Ca		95.11±1.02Ca		1.64±0.26Ba		1.52±0.25Ba		230.09±1.35Cb		303.22±1.47Ca
鄂尔多斯Ordos	1 124.55±2.41Aa		965.11±2.44Bb		191.93±1.59Aa		187.04±1.50Ba		4.12±0.63Aa		4.08±0.72Aa		677.53±2.93Bb		500.87±2.71Ba

采样点 Sample plots		根长/cm Root length				根系表面积/cm² Root surface area				根系体积/cm³ Root volume				直径为0~0.5 mm根长/mm Root length with diameter 0-0.5 mm
采样点 Sample plots		对照CK		处理T		对照CK		处理T		对照CK		处理T		对照CK		处理T
四子王旗Siziwang Banner	892.99±2.07Bb		1 043.79±2.42Aa		135.66±1.13Bb		266.15±1.66Aa		3.24±0.58Aa		4.02±0.61Aa		849.61±2.94Aa		739.89±2.16Ab
赤峰Chifeng	889.05±2.03Ba		939.69±2.27Ba		93.23±0.95Ca		95.11±1.02Ca		1.64±0.26Ba		1.52±0.25Ba		230.09±1.35Cb		303.22±1.47Ca
鄂尔多斯Ordos	1 124.55±2.41Aa		965.11±2.44Bb		191.93±1.59Aa		187.04±1.50Ba		4.12±0.63Aa		4.08±0.72Aa		677.53±2.93Bb		500.87±2.71Ba

采样点 Sample plots	地上生物量/g Aboveground biomass		地下生物量/g Underground biomass		总生物量/g Total biomass		根冠比 Root-shoot ratio
采样点 Sample plots	对照CK	处理T	对照CK	处理T	对照CK	处理T	对照CK	处理T
四子王旗	1.47±0.12Aa	1.41±0.11Aa	0.75±0.05Aa	0.70±0.05Aa	2.22±0.18Aa	2.11±0.17Aa	0.51±0.04Aa	0.50±0.03Aa
Siziwang Banner
赤峰Chifeng	1.24±0.08Ca	0.99±0.07Cb	0.57±0.03Ba	0.35±0.02Bb	1.81±0.12Ca	1.34±0.09Cb	0.46±0.03Ba	0.35±0.02Ba
鄂尔多斯Ordos	1.32±0.08Ba	1.09±0.06Bb	0.59±0.03Ba	0.38±0.02Bb	1.91±0.13Ba	1.47±0.11Bb	0.45±0.03Ba	0.35±0.03Ba

采样点 Sample plots	地上生物量/g Aboveground biomass		地下生物量/g Underground biomass		总生物量/g Total biomass		根冠比 Root-shoot ratio
采样点 Sample plots	对照CK	处理T	对照CK	处理T	对照CK	处理T	对照CK	处理T
四子王旗	1.47±0.12Aa	1.41±0.11Aa	0.75±0.05Aa	0.70±0.05Aa	2.22±0.18Aa	2.11±0.17Aa	0.51±0.04Aa	0.50±0.03Aa
Siziwang Banner
赤峰Chifeng	1.24±0.08Ca	0.99±0.07Cb	0.57±0.03Ba	0.35±0.02Bb	1.81±0.12Ca	1.34±0.09Cb	0.46±0.03Ba	0.35±0.02Ba
鄂尔多斯Ordos	1.32±0.08Ba	1.09±0.06Bb	0.59±0.03Ba	0.38±0.02Bb	1.91±0.13Ba	1.47±0.11Bb	0.45±0.03Ba	0.35±0.03Ba

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