|Table of Contents|

Effects of Water and Nitrogen Coupling on Antioxidant Physiological Characteristics of Soft-seeded Pomegranate Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年11
Page:
29-37
Research Field:
Publishing date:

Info

Title:
Effects of Water and Nitrogen Coupling on Antioxidant Physiological Characteristics of Soft-seeded Pomegranate Seedlings
Author(s):
CHAI Yaqian; GUAN Sihui; CUI Hongxin; WAN Wenliang; DIAO Ming
(School of Agriculture，Shihezi University/Key Laboratory of Special Fruit and Vegetable Cultivation，Physiology and Germplasm Resources Utilization，Xinjiang Production and Construction Group，Shihezi，Xinjiang 832003)
Keywords:
water and nitrogen; pomegranate seedlings; drought stress; antioxidase
PACS:
-
DOI:
10.11937/bfyy.20223945
Abstract:
Taking ‘Tunis’ soft-seeded pomegranate seedlings as the test material，three irrigation (W1,the upper and lower limits of irrigation were 35%-45% of the field water holding capacity；W2,the upper and lower limits of irrigation were 55%-65% of the field water holding capacity；W3,the upper and lower limits of irrigation were 75%-85% of the field water holding capacity) and four N application (N0，0 g?kg-1；N1，0.1 g?kg-1；N2，0.2 g?kg-1；N3，0.3 g?kg-1) treatments were set up.The effects of different treatments on the relative water content (RWC)，photosynthetic pigment content (chlorophyll and carotenoids)，membrane permeability indexes (relative electrical conductivity (REC) and malondialdehyde (MDA) content，hydrogen peroxide (H2O2) content，superoxide anion (O?2-) production rate and antioxidant enzyme activity were investigated in pots，and heat map clustering and principal component analysis were performed for each index after 40 days of treatment,in order to provide reference for cultivating of soft-seeded pomegranate.The results showed that the irrigation level of 35%-45% (W1) of field capacity significantly inhibited the activities of SOD，APX，POD and CAT，and decreased the total chlorophyll and carotenoid content.However，suitable nitrogen application could alleviate the inhibition effect，and high nitrogen application could aggravate the drought stress degree of pomegranate.The activities of SOD，APX，POD，CAT and photosynthetic pigment contents were relatively high，but the contents of REC，MDA，O?2- and H2O2 were relatively low when the irrigation amount was 55%-65% of field capacity (W2).When the irrigation amount was 75%-85% of field capacity (W3)，the indexes were slightly decreased compared with that of W2，and the pomegranate treated with N2 and N3 had higher photosynthetic pigment content and antioxidant enzyme activity under both W2 and W3 conditions.In conclusion，the clustering and principal component analysis showed that W2N2 was the best water and nitrogen operation mode under this experimental condition.

References:

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Last Update: 2023-07-25