Crops ›› 2019, Vol. 35 ›› Issue (6): 120-126.doi: 10.16035/j.issn.1001-7283.2019.06.019

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Effects of Different Light Quality on Characteristics of Sessile-Tuberization and Photosynthetic Performance with Single Node Stems in Potato

Guo Jinting1,Teng Yue1,Gao Yuliang2,Zhang Yan3,Li Kuihua1   

  1. 1Agricultural College of Yanbian University, Yanji 133002, Jilin, China
    2Yanbian Academy of Agricultural Sciences,Longjing 133400, Jilin, China
    3Bureau of Agricultural and Rural Affairs of Jilin, Jilin 132000, Jilin, China
  • Received:2019-06-06 Revised:2019-07-14 Online:2019-12-15 Published:2019-12-11
  • Contact: Kuihua Li

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Abstract:

The stem segments of single leaf in Yanshu No.4 were transferred into white light, red light, blue light and red-blue light (4:1). The potato-bearing characteristics, the contents of sucrose and starch, and photosynthetic characteristics of axillary bud potato were determined. The results showed that, for the blue light treatment compared with the other light group, the initiation time of tuber formation was earlier, the average weight of tuber was the highest, and the contents of dry matter and sucrose reached the maximum. Of all the treatments, the contents of chlorophyll a and chlorophyll b, net photosynthetic rate (Pn), actual quantum yield (YPSⅡ), electron transport rate (ETR), photochemical quenching coefficient (qP) were the greatest in leaves under the blue light treatment. Under the red light treatment, transpiration rate (Tr), intercellular CO2 concentration (Ci) and stomatal conductance (Gs) were significantly higher than those of other treatments. There was no significance in the photochemical efficiency (Fv/Fm) among all of different light treatments at same culture time. Therefore, blue light is the most suitable artificial light source for inducing potato sessile-tuber formation.

Key words: Potato, Single node stem, Axillary bud potato, Light quality, Photosynthetic characteristics

Table 1

Characteristics of potato sessile tuberization under the different light quality treatments"

光质
Light quality		 结薯始期(d)
Initial days of tuber induction		 平均薯重(g)
Average tuber weight		 结薯率(%)
Percent tuberization
红光Red light 5.37±0.45ab 0.148±0.01c 61.2±1.86d
蓝光Blue light 3.50±0.30c 0.383±0.02a 93.3±2.72a
红蓝光Red-blue light 4.90±0.20b 0.247±0.03b 75.0±2.23b
白光White light 5.77±0.35a 0.237±0.02b 70.6±2.49c

Table 2

Dynamic changes of photosynthetic pigment content in potato single-node stem under the different light quality treatments"

扦插后培养天数
Days after cutting (d)		 光质
Light quality		 叶绿素a (mg/gFM)
Chlorophyll a		 叶绿素b (mg/gFM)
Chlorophyll b		 叶绿素a/b
Chlorophyll a/b		 类胡萝卜素(mg/gFM)
Carotenoid
1 红光Red light 2.001±0.086c 0.754±0.009c 2.655±0.084a 0.261±0.002b
蓝光Blue light 2.335±0.049a 0.911±0.016a 2.566±0.020a 0.278±0.009a
红蓝光Red-blue light 2.176±0.032b 0.838±0.012b 2.596±0.075a 0.268±0.007ab
白光White light 2.161±0.050b 0.853±0.024b 2.534±0.101a 0.266±0.001b
3 红光Red light 1.969±0.121b 0.725±0.009c 2.715±0.138a 0.259±0.006b
蓝光Blue light 2.242±0.048a 0.879±0.018a 2.634±0.071a 0.291±0.009a
红蓝光Red-blue light 1.993±0.080b 0.752±0.011c 2.652±0.134a 0.277±0.015ab
白光White light 2.086±0.062ab 0.796±0.011b 2.623±0.108a 0.256±0.014b
4 红光Red light 1.944±0.157b 0.729±0.012c 2.666±0.197a 0.271±0.004b
蓝光Blue light 2.271±0.109a 0.846±0.012a 2.685±0.161a 0.289±0.006a
红蓝光Red-blue light 1.907±0.079b 0.743±0.009c 2.567±0.086a 0.269±0.007b
白光White light 2.101±0.059ab 0.799±0.007b 2.629±0.097a 0.253±0.011c
5 红光Red light 1.739±0.090b 0.687±0.011c 2.503±0.100a 0.271±0.007a
蓝光Blue light 2.028±0.111a 0.768±0.006a 2.597±0.073a 0.284±0.009a
红蓝光Red-blue light 1.725±0.055b 0.713±0.016b 2.512±0.113a 0.266±0.006a
白光White light 1.799±0.086ab 0.750±0.003a 2.446±0.045a 0.269±0.015a
10 红光Red light 1.702±0.065b 0.633±0.011c 2.592±0.071a 0.271±0.016a
蓝光Blue light 1.955±0.057a 0.755±0.011a 2.591±0.105a 0.285±0.008a
红蓝光Red-blue light 1.663±0.082b 0.668±0.014b 2.494±0.176a 0.262±0.017a
白光White light 1.837±0.071a 0.713±0.004b 2.576±0.086a 0.267±0.009a

Table 3

Changes of photosynthetic parameter in potato single-node stem under the different light quality treatments"

扦插天数Days after cutting (d) 光质 Light quality Pn[μmol/(m·s)] Tr[mmol/(mol·s)] Ci (μmol/mol) Gs[mmol/(m2·s)]
1 红光Red light -1.002±0.095a 0.257±0.021a 518.501±9.226b 10.777±0.484a
蓝光Blue light -0.721±0.021a 0.137±0.012c 491.233±4.598c 06.223±0.179d
红蓝光Red-blue light -1.087±0.105a 0.161±0.011c 506.367±4.474b 08.651±0.187b
白光White light -0.851±0.031a 0.202±0.013b 497.567±5.129bc 07.517±0.161c
3 红光Red light -1.342±0.091d 0.233±0.006a 454.253±11.541a 12.353±0.880a
蓝光Blue light -0.501±0.031a 0.147±0.006c 357.813±3.179d 08.033±0.192d
红蓝光Red-blue light -1.181±0.056c 0.173±0.015b 419.693±7.207b 10.453±0.330b
白光White light -0.779±0.057b 0.223±0.015a 399.297±9.152c 09.487±0.292c
4 红光Red light -0.051±0.004d 0.250±0.017a 399.733±4.043a 11.101±0.794a
蓝光Blue light -0.627±0.068a 0.150±0.010b 280.617±1.530d 06.491±0.226d
红蓝光Red-blue light -0.243±0.041c 0.177±0.006b 376.867±10.735b 09.463±0.295b
白光White light -0.353±0.012b 0.241±0.020a 318.860±4.855c 08.293±0.203c
5 红光Red light -0.707±0.076c 0.357±0.032a 323.017±9.147a 17.741±0.118a
蓝光Blue light -1.696±0.077a 0.313±0.015a 219.677±8.074d 14.457±0.201c
红蓝光Red-blue light -1.370±0.035b 0.330±0.010a 295.333±7.234b 17.393±1.026ab
白光White light -1.581±0.054a 0.340±0.036a 275.025±5.001c 15.811±1.484bc
10 红光Red light -0.493±0.035b 0.147±0.012b 529.117±4.664a 10.643±0.405a
蓝光Blue light -1.341±0.013a 0.113±0.006c 336.627±6.916d 05.491±0.052d
红蓝光Red-blue light -0.643±0.293b 0.173±0.015b 487.407±3.137b 08.551±0.633b
白光White light -1.097±0.062a 0.225±0.027a 449.313±14.351c 07.490±0.205c

Table 4

Changes of chlorophyll fluorescence parameters in potato single-node stem under the different light quality treatments μmol/mol"

扦插天数Days after cutting (d) 光质Light quality Fv/Fm YPSⅡ ETR qP
1 红光Red light 0.789±0.003a 0.046±0.003a 16.567±0.351c 0.045±0.005c
蓝光Blue light 0.779±0.002a 0.051±0.003a 26.201±1.253a 0.103±0.012a
红蓝光Red-blue light 0.785±0.005a 0.045±0.005a 22.733±0.851b 0.075±0.003b
白光White light 0.779±0.008a 0.035±0.004b 24.001±0.265b 0.071±0.003b
3 红光Red light 0.787±0.006a 0.035±0.005c 12.833±0.737d 0.055±0.005d
蓝光Blue light 0.780±0.020a 0.058±0.003a 26.933±0.702a 0.106±0.005a
红蓝光Red-blue light 0.775±0.009a 0.035±0.005c 18.533±0.569c 0.068±0.003c
白光White light 0.777±0.006a 0.052±0.002b 23.767±0.723b 0.084±0.004b
4 红光Red light 0.774±0.023a 0.187±0.006c 14.433±0.208d 0.352±0.008d
蓝光Blue light 0.782±0.008a 0.351±0.031a 23.933±0.288a 0.551±0.019a
红蓝光Red-blue light 0.773±0.011a 0.183±0.012c 16.233±1.059c 0.436±0.002c
白光White light 0.781±0.011a 0.284±0.011b 21.201±1.201b 0.491±0.005b
5 红光Red light 0.787±0.002a 0.196±0.005c 17.333±0.551c 0.316±0.006c
蓝光Blue light 0.777±0.003a 0.306±0.004a 23.267±1.011a 0.453±0.016a
红蓝光Red-blue light 0.777±0.003a 0.203±0.006c 21.201±1.389b 0.401±0.010b
白光White light 0.776±0.004a 0.252±0.003b 22.433±0.208ab 0.417±0.011b
10 红光Red light 0.790±0.004a 0.167±0.002c 13.967±0.832c 0.248±0.022c
蓝光Blue light 0.773±0.006a 0.251±0.008a 22.567±1.059a 0.438±0.005a
红蓝光Red-blue light 0.781±0.018a 0.165±0.007c 17.733±1.258b 0.362±0.014b
白光White light 0.779±0.004a 0.222±0.015b 20.933±0.681a 0.418±0.006a

Fig.1

Effects of sucrose and dry matter content in potato single-node stem under the different light quality treatments"

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