小麦产量与品质对灌浆不同阶段高温胁迫的响应

doi:10.17521/cjpe.2005.0061

摘要/Abstract

摘要：

利用人工环境控制室对盆栽冬小麦 (品种 :‘济南 17’和‘鲁麦 2 1’) (Triticumaestivumcv.‘Ji′nan17’and‘Lumai2 1’) 分别在子粒灌浆前期、中期和后期进行了 2 5℃ / 35℃ (夜 /昼 ) 的高温胁迫处理, 以生长在 2 0℃ / 30℃ (夜 /昼 ) 环境中的小麦为对照, 研究了灌浆期不同阶段高温胁迫对小麦产量和品质的影响。结果发现 :1) 子粒蛋白质积累速率在高温处理期间显著提高 (p<0.0 5 ), 但高值持续期缩短, 并最终造成植株氮素积累量减少, 氮素收获指数降低 (p <0.0 5 ) 。 2 ) 小麦蛋白质的组成和品质对不同灌浆阶段的响应存在显著差异, 前期高温胁迫导致麦谷蛋白 /醇溶蛋白的比值以及麦谷蛋白大聚合体 (GMP) 含量增加, 标志蛋白质和淀粉品质的湿面筋含量升高、沉降值增加、膨胀势和高峰粘度等指标也显著提高 ;灌浆中期高温却导致上述指标降低 ;灌浆后期高温在造成粒重减小、产量降低和淀粉品质下降的同时, 却有利于蛋白质含量的提高。 3) 小麦淀粉积累的形成与蛋白质品质的形成是两个既相互联系又相互独立的过程, 高温条件下子粒蛋白质含量的升高是淀粉积累量减少造成的。

关键词: 小麦, 高温, 品质, 蛋白质, 淀粉

Abstract:

Changes in the yields and quality and the physiological response of winter wheat (Triticum aestivum cv. 'Ji′nan17' and 'Lumai21') grown under heat stress during different filling stages were studied. Winter wheat growing in flowerpots was transferred to temperature-controlled open top chambers (OTC) after anthesis. Heat stress treatments of 25 ℃/35 ℃ (night/day) were applied at early filling stage (1-10 days after anthesis), middle filling stage (11-20 days after anthesis), and late filling stage (21-30 days after anthesis). The controls were grown at temperatures of 20 ℃/30 ℃ (night/day). Protein accumulation rate, nitrogen accumulation and distribution, kernel weight and yield, test weight, protein composition, protein content, wet gluten content, glutenin macropolymer (GMP) content, and starch and protein quality traits were measured. The results showed that protein accumulation rate in wheat kernels grown in the 25 ℃/35 ℃ (night/day) chambers were higher than those in the control chambers (p<0.05) ; however, nitrogen accumulation was reduced and the nitrogen harvest index (NHI) declined under heat stress (p<0.05). There were differences in starch and protein quality responses to heat stress during the different filling stages. Protein and starch quality traits improved at the early filling stage but declined at the middle and late filling stages under heat stress; however, the protein content increased at late filling stage under heat stress. Protein content increased but kernel weight decreased under higher temperatures, which suggested that the starch accumulation rate decreased more sharply than protein accumulation rates under higher temperature. The two varieties, 'Ji'nan17' and 'Lumai21', showed similar responses to heat stress at the different filling stages.

Key words: Winter wheat, Heat stress, Protein, Starch, Quality

李永庚, 于振文, 张秀杰, 高雷明. 小麦产量与品质对灌浆不同阶段高温胁迫的响应. 植物生态学报, 2005, 29(3): 461-466. DOI: 10.17521/cjpe.2005.0061

LI Yong-Geng, YU Zhen-Wen, ZHANG Xiu-Jie, GAO Lei-Ming. RESPONSE OF YIELD AND QUALITY OF WHEAT TO HEAT STRESS AT DIFFERENT GRAIN FILLING STAGES. Chinese Journal of Plant Ecology, 2005, 29(3): 461-466. DOI: 10.17521/cjpe.2005.0061

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2005.0061

https://www.plant-ecology.com/CN/Y2005/V29/I3/461

图/表 6

表1 小麦灌浆期不同阶段各个处理的温度条件

Table 1 Temperature condition of each treatment at different grain filling stage

代号 Codes	处理名称 Treatment names	夜/昼温度 Night/Day temperature (℃)
代号 Codes	处理名称 Treatment names	开花后1~10天 1-10DAA	开花后11~20天 11-20DAA	开花后21~30天 21-30DAA
T0	对照 Control	20/30	20/30	20/30
T1	前期高温胁迫 Early heat stress	25/35	20/30	20/30
T2	中期高温胁迫 Middle heat stress	20/30	25/35	20/30
T3	后期高温斜胁迫 Later heat stress	20/30	20/30	25/35

图1 小麦子粒灌浆前期、中期和后期高温胁迫对 ‘济南17’ (A) 和 ‘鲁麦21’ (B) 子粒蛋白质积累速率 (PAR) 的影响 T0为对照, T1、T2和T3分别代表仅在子粒灌浆前期、中期和后期小麦受到了25℃/35℃ (夜/昼) 的高温胁迫

Fig.1 Protein accumulation rate (PAR) of ‘Ji'nan17’ (A) and ‘Lumai21’ (B) under heat stress T0 represent the control, T1, T2 and T3 represent the wheat suffered 25℃/35℃ (night/day) heat stress during early, middle and late filling stage, respectively

图2 小麦子粒灌浆前期、中期和后期高温胁迫对 ‘济南17’ 和 ‘鲁麦21’ 的植株氮素积累量 (NA) (A) 和氮素收获指数 (NHI) (B) 的影响 T0, T1, T2, T3:同图1

Fig.2 Nitrogen accumulations (NA) (A) and nitrogen harvest index (NHI) (B) of ‘Ji'nan17’ and ‘Lumai21’ under heat stress See Fig.1

图3 小麦子粒灌浆前期、中期和后期高温胁迫对 ‘济南17’ 和 ‘鲁麦21’的醇溶蛋白 (Gli.) 含量 (A) 、麦谷蛋白 (Glu.) 含量 (B) 、麦谷蛋白与醇溶蛋白含量之比 (Gli./Glu. index) (C) 和粒麦谷蛋白大聚合体 (GMP) 含量 (D) 的影响 T0, T1, T2, T3:同图1

Fig.3 Gliadin (Gli.) content (A), glutenin (Glu.) content (B), Glu./Gli. Index (C) and Glutenin micropolymer (GMP) content (D) of ‘Ji'nan17’ and ‘Lumai21’ under heat stress See Fig.1

图4 子粒灌浆前期、中期和后期高温胁迫对 ‘济南17’和 ‘鲁麦21’ 的穗粒数 (A) 、粒重 (B) 和每盆产量 (C) 的影响 T0, T1, T2, T3:同图1

Fig.4 Kernel number per spike (A), kernel weight (B) and yield (C) of ‘Ji'nan17’ (A) and ‘Lumai21’ (B) under heat stress See Fig.1

表2 灌浆期不同阶段分别处在不同温度下的 ‘济南17’ 和 ‘鲁麦21’的淀粉和蛋白质品质

Table 2 Starch and quality traits of ‘Ji'nan17’ and ‘Lumai21’ under different grain filling stage heat stress

品种 Cultivar	处理 Treatments	容重 Test weight (g·L^-1)	淀粉品质指标 Starch quality parameters		蛋白质品质指标 Protein quality parameters
品种 Cultivar	处理 Treatments	容重 Test weight (g·L^-1)	膨胀势 Swelling power (g·g^-1)	高峰粘度 PeakVisc. (RVU)	蛋白质含量 Protein contents (%)	湿面筋含量 Wet gluten contents (%)	沉降值 Sedimentation volume (ml)
‘济南17’ ‘Ji'nan 17’	T0	778^bA	6.84^bB	202.00^bB	13.27^cB	41.34^cC		49.6^bB
	T1	783^aA	8.04^aA	209.33^aA	14.26^bA	43.42^bB		56.8^aA
	T2	769^cB	6.00^cC	196.92^cB	13.30^cB	41.43^cC		47.9^cC
	T3	768^cB	5.54^dD	195.22^cB	14.39^aA	46.83^aA		46.7^dD
‘鲁麦21’ ‘Lumai 21’	T0	802^aA	8.84^bB	240.25^bB	11.56^cB	32.95^bB		34.9^bB
	T1	803^aA	9.64^aA	246.25^aA	12.66^bA	33.08^bB		39.5^aA
	T2	789^bA	8.00^cC	235.50^cC	11.58^cB	31.72^cC		33.4^cC
	T3	788^bA	7.94^cC	229.83^dC	13.01^aA	34.07^aA		33.0^cC

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