耐鹽黃瓜品種鑒定及萌芽期鹽脅迫對(duì)黃瓜苗期耐鹽性的影響

Identification of Salt Tolerant Cucumber Varieties and the Effect of Salt Stress During Germination Stage on Salt Tolerance During Cucumber Seedling Stage

doi: 10.3969/j.issn.2096-7047.2024.04.006

Lanxing SHEN ,

張小村 Xiaocun ZHANG ,

孔凡美 Fanmei KONG ,

呂紫佳 Zijia Lü ,

漆奕輝 Yihui QI ,

孟婷婷 Tingting MENG ,

占楠彪 Nanbiao ZHAN

山東農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院 山東泰安 271018 College of Resources and Environment, Shandong Agricultural University, Tai′an, Shandong 271018, China

摘要：

為明確不同黃瓜品種在萌芽期及苗期對(duì)NaCl脅迫的耐性差異，以常見的24個(gè)黃瓜品種為試驗(yàn)對(duì)象，研究了萌芽期及苗期主要生長指標(biāo)對(duì)NaCl脅迫的響應(yīng)情況，同時(shí)探討了萌芽期鹽處理對(duì)典型耐鹽黃瓜品種在苗期鹽害耐受性的影響。結(jié)果表明：萌芽期120 mmol/L NaCl溶液處理顯著抑制了黃瓜的平均胚根長，對(duì)發(fā)芽率的影響較小，但不同黃瓜品種間的發(fā)芽率存在顯著差異；50 mmol/L NaCl溶液處理對(duì)苗期黃瓜的平均根長、莖長、莖粗、植株鮮質(zhì)量等各項(xiàng)指標(biāo)均有顯著抑制。結(jié)合萌芽期相對(duì)鹽害率和苗期鹽害指數(shù)，鑒定出耐鹽黃瓜品種為申青1號(hào)、至尊187；鹽敏感品種為津優(yōu)1號(hào)、津優(yōu)35、碧玉，苗期的鹽害指數(shù)均大于80.00%。萌芽期鹽處理后移栽的耐鹽黃瓜申青1號(hào)幼苗在苗期鹽處理?xiàng)l件下的7天存活率為0，極顯著低于萌芽期未經(jīng)鹽脅迫處理的77.78%，表明培育壯苗對(duì)提高鹽漬化土壤中黃瓜幼苗的存活率具有重要的意義。

Abstract：

In order to clarify the differences in tolerance to NaCl stress among different cucumber varieties during the germination and seedling stages, 24 common cucumber varieties are used as experimental subjects to study the response of main growth indicators during the germination and seedling stages to NaCl stress. At the same time, the effect of salt treatment during the germination stage on the salt tolerance of typical salt tolerant cucumber varieties during the seedling stage is explored. The results show that treatment with 120 mmol/L NaCl solution during the germination stage significantly inhibited the average radicle length of cucumber, with little effect on germination rate. However, there are significant differences in germination rate among different cucumber varieties. The treatment with 50 mmol/L NaCl solution significantly inhibited various indicators such as average root length, stem length, stem thickness, and fresh plant weight of cucumber seedlings. Based on the relative salt damage rate during the germination stage and the salt damage index during the seedling stage, salt tolerant cucumber varieties are identified as Shenqing 1 and Zhizun 187. The salt sensitive varieties are Jinyou 1, Jinyou 35, and Biyu, and the salt damage index during the seedling stage is all greater than 80.00%. Under salt treatment condition during the seedling stage, the 7-day survival rate of salt tolerant cucumber Shenqing 1 seedlings transplanted after salt treatment during the germination stage is 0, which is significantly lower than the 77.78% without salt stress treatment during the germination stage. The result indicates that cultivating strong seedlings is of great significance in improving the survival rate of cucumber seedlings in saline soil.

Keyword：

cucumber; salt stress; salt tolerance; variety identification;

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