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Effects of Chromium Stress on Physiological Traits and Morphological Characteristics of Rice Leaves
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Qing Liu1, Luhong Sun2, Shiwei Gao1, Yuqiang Liu1, Huilin Chang1, Cheng Ma1, Jingze Wang1, Cuiling Wang3, Shoujun Nie1
Crops | 2026, 42(1) : 143 - 151
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Crops | 2026, 42(1): 143-151
Effects of Chromium Stress on Physiological Traits and Morphological Characteristics of Rice Leaves
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Qing Liu1, Luhong Sun2, Shiwei Gao1, Yuqiang Liu1, Huilin Chang1, Cheng Ma1, Jingze Wang1, Cuiling Wang3, Shoujun Nie1
Affiliations
  • 1Suihua Branch of Heilongjiang Academy of Agricultural Sciences, Suihua 152000, Heilongjiang, China
  • 2Quality and Nutrition Inspection and Testing Centre for Rice and Processed Products (Huachuan), Ministry of Agriculture and Rural Affairs, Jiamusi 154000, Heilongjiang, China
  • 3Quality and Safety Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin 150000, Heilongjiang, China
Published: 2026-02-15 doi: 10.16035/j.issn.1001-7283.2026.01.018
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Using two rice varieties, Suijing 309 (SJ309) and Longqingdao 31 (LQD31), as experimental materials, the effects of chromium (Cr) stress on the physiological traits and morphological characteristics of rice leaves were investigated. The results showed that Cr was primarily enriched in the roots of rice, and SJ309 was more effective than LQD31 in reducing the absorption and translocation of Cr. Under high-concentration Cr stress (100 μmol/L), the physiological characteristics such as stomatal conductance, transpiration rate, water use efficiency, and photosynthetic pigments decreased in both varieties, while leaf vapor pressure deficit, intercellular CO2 concentration, and malondialdehyde (MDA) content increased. After Cr stress treatment, only LQD31 exhibited an increase in the stomatal area of guard cells and closure of the stomatal aperture, whereas no significant changes were observed in SJ309. Compared with SJ309, the contents of abscisic acid (ABA) and salicylic acid (SA) in LQD31 increased significantly, leading to the overexpression of NCED1 and NCED2 genes involved in the regulation of stomatal aperture, which indicated that LQD31 was more sensitive to Cr stress. Furthermore, Cr stress significantly increased the density and length of non-glandular trichomes in SJ309, suggesting its ability to withstand UV damage and various environmental stresses. In summary, SJ309 demonstrates superior tolerance to Cr stress, and its hyperaccumulation characteristics can be utilized for the phytoremediation of Cr-contaminated soils.

Chromium stress  /  Rice  /  Physiological characteristics  /  Leaf  /  Morphological characteristics
Qing Liu, Luhong Sun, Shiwei Gao, Yuqiang Liu, Huilin Chang, Cheng Ma, Jingze Wang, Cuiling Wang, Shoujun Nie. Effects of Chromium Stress on Physiological Traits and Morphological Characteristics of Rice Leaves[J]. Crops, 2026 , 42 (1) : 143 -151 . DOI: 10.16035/j.issn.1001-7283.2026.01.018
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Article Info
doi: 10.16035/j.issn.1001-7283.2026.01.018
  • Receive Date：2024-09-12
  • Online Date：2026-04-30
  • Published：2026-02-15
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  • Received：2024-09-12
  • Revised：2024-11-09
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Affiliations
    1Suihua Branch of Heilongjiang Academy of Agricultural Sciences, Suihua 152000, Heilongjiang, China
    2Quality and Nutrition Inspection and Testing Centre for Rice and Processed Products (Huachuan), Ministry of Agriculture and Rural Affairs, Jiamusi 154000, Heilongjiang, China
    3Quality and Safety Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin 150000, Heilongjiang, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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