Fallah Mehdi, Imani Alli, Rasouli Mousa
Department of Horticulture, College of Aburaihan, University of Tehran, Tehran, Iran.
Temperate Fruits Research Center, Horticultural Science Research Institute (HSRI), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
BMC Plant Biol. 2025 Sep 2;25(1):1181. doi: 10.1186/s12870-025-07247-6.
Drought is a major environmental stress severely restricting plant growth, development, and productivity in arid regions. In this research, seven interspecific peach × almond hybrids (‘GF677’, ‘GN15’, ‘GN2’, ‘TT’, ‘35.1’, ‘34.2’, and ‘50.10’) were evaluated for their drought stress tolerance to identify promising rootstocks. Drought stress treatments were applied at 40%, 60%, and 100% field capacity (FC). Following a two-month stress period, morphological, physiological, and biochemical traits, along with the concentrations of 10 elements in leaves and roots, were measured. Under severe drought stress, all rootstocks exhibited reductions in plant height, trunk diameter, new branch growth, root and shoot fresh and dry weights, and relative water content, with an increase in the number of necrotic and fallen leaves. Drought stress significantly impaired PSII efficiency. At 40% FC, rootstocks ‘TT’ (0.749) and ‘GF677’ (0.740) exhibited the highest QYmax, while rootstocks ‘50.10’ (0.650) and ‘34.2’ (0.688) had the lowest. Under 40% field capacity (FC) stress, protein content and the activities of APX and CAT decreased, while proline, antioxidant capacity, electrolyte leakage, and aldehyde levels increased. Under drought stress, ‘TT’ displayed higher leaf concentrations of N (2.08%), P (0.17%), Ca (1.45%), Mg (0.56%), Fe (184.71 mg kg), Cu (5.07 mg kg), and Zn (18.77 mg kg). In contrast, rootstock ‘50.10’ exhibited the highest concentrations of Cl (4.83%), P (0.24%), and Zn (18.85 mg kg) and the lowest concentrations of N, K, Ca, and Fe. Finally, this research introduces ‘TT’ rootstock as a promising drought-tolerant rootstock.
The online version contains supplementary material available at 10.1186/s12870-025-07247-6.
干旱是一种主要的环境胁迫，严重限制了干旱地区植物的生长、发育和生产力。在本研究中，对7个种间桃×扁桃杂交种（‘GF677’、‘GN15’、‘GN2’、‘TT’、‘35.1’、‘34.2’和‘50.10’）的耐旱性进行了评估，以确定有潜力的砧木。在田间持水量（FC）为40%、60%和100%的条件下进行干旱胁迫处理。经过两个月的胁迫期后，测量了形态、生理和生化性状，以及叶片和根系中10种元素的浓度。在严重干旱胁迫下，所有砧木的株高、树干直径、新梢生长、根和地上部鲜重和干重以及相对含水量均降低，坏死和落叶数量增加。干旱胁迫显著损害了PSII效率。在田间持水量为40%时，砧木‘TT’（0.749）和‘GF677’（0.740）表现出最高的QYmax，而砧木‘50.10’（0.650）和‘34.2’（0.688）最低。在田间持水量为40%的胁迫下，蛋白质含量以及APX和CAT的活性降低，而脯氨酸、抗氧化能力、电解质渗漏和醛水平增加。在干旱胁迫下，‘TT’叶片中的N（2.08%）、P（0.17%）、Ca（1.45%）、Mg（0.56%）、Fe（184.71 mg/kg）、Cu（5.07 mg/kg）和Zn（18.77 mg/kg）浓度较高。相比之下，砧木‘50.10’的Cl（4.83%）、P（0.24%）和Zn（18.85 mg/kg）浓度最高，而N、K、Ca和Fe浓度最低。最后，本研究将‘TT’砧木作为一种有潜力的耐旱砧木进行了介绍。
在线版本包含可在10.1186/s12870-025-—07247-6获取的补充材料。
