Effects of Overexpressing PpSnRK1α on the Growth of Tomato Plants Under Nutrient Stress

doi:10.16420/j.issn.0513-353x.2016-0639

ACTA HORTICULTURAE SINICA ›› 2017, Vol. 44 ›› Issue (4): 644-652.doi: 10.16420/j.issn.0513-353x.2016-0639

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Effects of Overexpressing PpSnRK1α on the Growth of Tomato Plants Under Nutrient Stress

LUO Jingjing1，ZHANG Yafei1，PENG Yan2，PENG Futian1,*，ZHAO Yongfei1，and YU Wen1

（1College of Horticulture Science and Engineering，Shandong Agricultural University，State Key Laboratory of Crop Biology，Tai’an，Shandong 271018，China；2College of Plant Science，Huazhong Agricultural University，Wuhan 430070，China）

Online:2017-04-25 Published:2017-04-25

Abstract

Abstract:

PpSnRK1α-overexpressing tomato（T_2-3）and wild type tomato were used to study the effects of SnRK1 on the growth of tomato plants under nutrient stress. The results shows that：compared with wild type tomato，SnRK1 activity in leaves and roots increased by 41.55% and 39.46% of PpSnRK1α-overexpressing tomato under nutrient stress. The average photosynthetic rates increased by 18.98% in mature leaves of T_2-3 compared with wild type. After 12 days under low nutrient stress，the transgenic lines overexpressing PpSnRK1α showedbetter antioxidant enzymes and root activity. The SOD，POD，CAT activities and root activity were increased 35.56% 8.85% 14.90% and 26.39% compared with wild type. The content of N，P in the stem and leaf of T_2-3 was higher than that of wild type plants，while there was no obvious difference in the K content. In the roots，there were no significant difference in

the N，P content，while the content of K of transgenic line is obviously higher than that of wild type. In addition，more N was distributed to aboveground parts. These results above show that overexpressing PpSnRK1α can improve the photosynthetic rates and promote the absorption of nitrogen，and then delay the leaf senescence.

Key words: peach, SnRK1, nutrient stress, tomato, photosynthetic rate, nutrient content, antioxidant enzyme

CLC Number:

LUO Jingjing1，ZHANG Yafei1，PENG Yan2，PENG Futian1,*，ZHAO Yongfei1，and YU Wen1. Effects of Overexpressing PpSnRK1α on the Growth of Tomato Plants Under Nutrient Stress[J]. ACTA HORTICULTURAE SINICA, 2017, 44(4): 644-652.

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Effects of Overexpressing PpSnRK1α on the Growth of Tomato Plants Under Nutrient Stress

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