Comparative effect of 28 homobrassinolide and salicylic acid in the amelioration of NaCl stress in Brassica juncea L.
Among various environmental stresses, salt stress is extensively damaging to major crops all over the world. An experiment was conducted to explore the role of exogenously applied 28 homobrassinolide (HBL) and salicylic acid (SA) on growth, photosynthetic parameters, transpiration and proline content of Brassica juncea L. cultivar Varuna in presence or absence of saline conditions (4.2 dsm(-1)). The leaves of 29d old plants were sprayed with distilled water, HBL and/or SA and plant responses were studied at 30 days after sowing (24 h after spray) and 45 days after sowing. The salinity significantly reduced the plant growth, gas exchange parameters but increased proline content and electrolyte leakage in the leaves. The effects were more pronounced at 30 DAS than 45 DAS. Out of the two hormones (HBL/SA) HBL excelled in its effects at both sampling stages. Toxic effects generated by salinity stress were completely overcome by the combination of the two hormones (HBL and SA) at 45 DAS.
Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India. hayat_68@yahoo.co.in
Shamsul
S
Hayat
Pragya
P
Maheshwari
Arif Shafi
AS
Wani
Mohd
M
Irfan
Mohammed Nasser
MN
Alyemeni
Aqil
A
Ahmad
D002778:Cholestanones / Q000494:pharmacology*; D004573:Electrolytes / Q000378:metabolism; D009149:Mustard Plant / Q000187:drug effects* / Q000502:physiology; D010788:Photosynthesis / Q000187:drug effects; D010937:Plant Growth Regulators / Q000494:pharmacology*; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D011392:Proline / Q000378:metabolism; D020156:Salicylic Acid / Q000494:pharmacology*; D054712:Salinity; D055049:Salt Tolerance / Q000187:drug effects*; D012965:Sodium Chloride / Q000633:toxicity*; D013312:Stress, Physiological / Q000187:drug effects*; D014867:Water
D002778:Cholestanones; D004573:Electrolytes; D010937:Plant Growth Regulators; D014867:Water; D012965:Sodium Chloride; C070163:homobrassinolide; D011392:Proline; D020156:Salicylic Acid