|
|
Effects of Exogenous H2S on Growth of Tomato Double-root-cutting Grafted Rootstocks and Seedlings |
WU Guoxiu,WU Changjiang,DONG Yaoxin,NIU Xuxu,LI Yang,LI Yanman,LI Shengli* |
College of Horticulture,Henan Agricultural University,Zhengzhou 450002,Henan,China |
|
|
Abstract In order to select proper concentration of hydrogen sulfide(H2S)suitable for root regeneration and growth of double-root-cutting grafted tomato seedling,this paper took‘Jinzuan’as rootstock and ‘Fendujinguanwang’as scion;and studied the effects of different concentrations of NaHS(0.1,0.2,0.3,0.4,0.5 mmol · L-1,donor of H2S)solutions on growth and root system morphology of tomato double-rootcutting grafted rootstocks and seedlings.The results showed that seedlings treated with 0.2 mmol · L-1 NaHS all reached the maximum value in plant height,stem diameter,leaf area,dry and fresh single plant weight and regenerative root activity of root-cutting rootstocks;and also significantly increased the endogenous H2S content,activity of D-cysteine desulfhydrase(DCD)of rootstock.Meanwhile,0.2 mmol · L-1 NaHS could notably promote the growth and root system development of double-root-broken tomato grafted seedlings.
|
Received: 16 July 2022
|
|
|
|
|
|
|