Table salinity does n’t in reality have to come from a salt mover and shaker to involve plant growth . In fact , atomic number 11 chloride ( NaCl ) is very commonly found in soil . Where the state is used for agrarian purposes , table salt lean to accumulate as plant take out other minerals out of the ground , leaving the salt behind . Irrigation tends to deliver salinity from dry land body of water , where it dissolved out of rocks . mellow absorption of saltiness feign about 20 per centum of farm land in the United States , and the share is increase with each passing class .
Salt Chemistry in Plants
Sodium chloride readily dissolve in piss , separate into negatively - charged atomic number 17 atoms and positively - charge sodium atoms . In works cells , the atomic number 11 is near enough chemically to potassium ( K ) which is also positively - charged . Na tie to cell sites and competes with the call for potassium , robbing the works of critical cell affair in the process .
How Salt Mimics Dehydration
Salt has been used to dry and preserve food for millennia , because osmosis works by drawing water system toward the salt . For flora , that mean that the water leaches from the roots and ca n’t circulate freely through the plant life . Though there still may be plenty of wet in the filth , the works ca n’t access it , just as if there were a true drouth .
Plant Defenses
Plants react to water release by closing the stoma in their parting , which concentrate piss loss through transpiration . They also produce a molecule called proline , which acts to stabilise the cellular telephone tissue layer so they ca n’t lose water through osmosis so readily .
How Salt Harms Photosynthesis
A plant ’s reply to drought conditions is stand for to be a temporary coping mechanism . Long - term drouth or saline exposure comes with unfortunate consequences . The stomate that penny-pinching to keep in weewee vapor also keep out C dioxide . Photosynthesis work by converting carbon dioxide and H2O into glucose and O ; no carbon dioxide means no photosynthesis . No photosynthesis means no more food energy .
Visible Signs of Salt Poisoning
modest common salt poisoning causes most works to sprain bluish - green as the sodium replaces potassium in some of the plant cells . Plants may be wilted , as they postulate water atmospheric pressure in their cells to maintain their body structure . ontogeny will be slow and stunted . Harvest proceeds of yield and cum will be less or even nonexistent . For more severe saline solution concentrations , growth and stem evolution will be badly curtailed and the plant will yellow as photoreceptive chlorophyll is ruin to use the energy elsewhere . For high concentration , the plant life will break down .
References
Related
