Regular Expressions 101

Non-Capturing Group(?:\s(?:low|high)\s)?

?repeats the group contents below at most once:

\sa Unicode whitespace character

Non-Capturing Group(?:low|high)

1st Alternativelow

lowthe literal text low (case sensitive)

2nd Alternativehigh

highthe literal text high (case sensitive)

\sa Unicode whitespace character

Non-Capturing Group(?:\S+\s+and\s)?

?repeats the group contents below at most once:

\S+any character that is not Unicode whitespace, repeated at least once

\s+a Unicode whitespace character, repeated at least once

andthe literal text and (case sensitive)

\sa Unicode whitespace character

\S+any character that is not Unicode whitespace, repeated at least once

Character Class[ \t]+

+matches at least one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Non-Capturing Group(?:stress|deficiency|limiting)

1st Alternativestress

stressthe literal text stress (case sensitive)

2nd Alternativedeficiency

deficiencythe literal text deficiency (case sensitive)

3rd Alternativelimiting

limitingthe literal text limiting (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:\s(?:low|high)\s)?(?:\S+\s+and\s)?\S+[ \t]+(?:stress|deficiency|limiting)

New

salt and water stress
photo-oxidative stress
salinity and high light stress
low-temperature stress
Cd stress
Cu deficiency
N deficiency
IMI stress

no match:

stress
deficiency
limiting
temperature and water
low
high
water and salt